Have you tried downloading the official Logitech Flight Panels Test Software?
I know some people have reported having problems with they way Windows handles USB power and their panels. Lorby AxisAndOhs has a tool called “win8/10 EnhancedPowerManagement” I think is meant to fix this problem. It’s free, so try it out (to use this dialog it is necessary to run the app as administrator).
Also there’s this program. I haven’t tested it, so I can’t vouch for it, but it sounds like it’s relevant:
When you first plug in the USB port any of the Saitek Flight Panels (radio, switch, etc) Windows install the unit, it says “wait while we install the Saitek…”, then it tells you it’s ready to use. The panels don’t light up until I start X-Plane, in my case, because X-Plane has plugin drivers for them. When Saitek provided drivers for them, you would install the driver in Windows, I guess that is what Windows is doing now. You should be able to see the installed panels when you go to Devices and Printers. I don’t really know what happens if I remove the plugin from X-Plane, maybe I will try it and let you know. MSFS needs drivers from Logitech, even they are installed in Windows, so it can interpret each knob or switch for the simm for every plane, that is the way it works in X-Plane, avery switch or button perform the same function in every plane, I am not sure about big airliners, I am just too busy with GA. Hope this help
I’m so surprised about this, especially with all the Alpha and Beta testing that happened. I applied for testing, I have the panels, and I never received the invite. 
It leave me to wonder whether if one of us had been invited, if the headache would have been avoided for all of us.
Looks like simconnect stutters will be sorted soon!
How the hell was this posted 21 hours ago, I’ve been refreshing that site all day… anyway.
These are the quotes we like:
PATCH UPDATE COMING WITHIN 7 DAYS
SIMCONNECT
- Significant FPS drop when using Simconnect should no longer affect the experience
Which means we’ll hopefully have 3rd party support next week when the patch comes.
You gotta do a Crtl+Refresh on their site. I they have page caching coded in or something.
sometime next week we will have caught up with the pre release! yay! 
glad a fix is comming
So before FS2020 was released I uninstalled all my P3D stuff and in the process I also uninstalled Simconnect thinking it was part of the P3D package. I can’t confirm whether a new version was installed with FS2020 or not. Can someone direct me to a download of the latest Simconnect module or whatever it is called? AFAIK, it is a Microsoft product. Thanks.
Yes, that’s exactly what I did and the same thought occured to me.
I think we are ok however I don’t see any reference to simconnect [presumably installed by MSFS 2020] in Programs and Features.
Some clarity on this matter would be welcome.
I chose to install the X-Plane plugin just to see if Radio lit up in that sim. Everything is fine so the Radio panel isn’t faulty, just crappy driver isn’t compatible with FS 2020. Guess we’ll have to wait on the update.
Thanks or the tips.
All that program does is disabled Enhanced Power Management. Essentially the Saitek panels go to sleep if they are turned on, then nothing communicates with them. This used to happen all the time with me with X-Plane, till I used this.
Without it, what you had to do was either turn the panels on just as you launch XP, or power cycle them if they have gone to sleep. The program removes that issue.
However, if you move them to another USB port, you will need to re-run the program, as the setting is written to a registry key(s) which relate to where the device is plugged in.
Ok with Lorby tools installed, panels seem to wok fine in FS 2020. I’ve disabled power management on all primary USB controller and hub devices via Windows 10 Device Manager and also in Power Plan settings 
It’s telling that small or one-man team utility authors such as Lorby and SPAD have managed to update their tools / drivers so quickly to work with the current SimConnect version yet a fairly large business like Logitech seem to struggle
Sadly those behemoth corporations aren’t interested in your experience, they are win by accountants and only interested in numbers. They still have not realised that if you provide the superior service and manpower to sorry their products those numbers they crunch will be larger if they invest into people. They were not taught that in accounting class 
To spad and axis and oh users the pain will soon be over with MS and Asobo repairing simconnect 
This is why the phrase …
"Shareholder value is a result, not a strategy. Your main constituencies are your employees, your customers and your products. Managers and investors should not set share price increases as their overarching goal. Short-term profits should be allied with an increase in the long-term value of a company.”
… exists. Basically, don’t cut costs by squeezing your employees’ wages and making everyone’s moral plummet, trimming customer service levels and cutting back on product development and improvement.
Sadly, a lot of companies have yet to receive the memo
it’s just a matter of waiting. I sent an email to logitech and they answered me this
Dear RAUL,
Thank you for contacting Logitech! My name is Nile and I’m glad to assist you with this matter.
As of the moment, a plugin for the MS Flight Sim 2020 is not available. Due to unforeseen changes between the Alpha and final versions of Flight Simulator, updated support for the Flight Panels has been delayed until September.
We will make sure to follow up with this concern to our appropriate team.
For future reference, your ticket number for this issue is 3929353 and you can reference it should you have any further questions regarding this case.
Best regards,
Nile
Logitech Customer Support
There is a free trial package which supports FIPs with some limited functions at x-planeorg until something better comes along. Search forums for “FIP” - supports FS2020 FSX P3D as well as x-plane
Logitech / Saitek has a captive market with its proprietary hardware, so I think it should put the software that provides the SimConnect service on Github and open it up to community contributions. The more people working to improve it, the quicker the update cadence. I often wonder just how many Logitech staff are assigned to the upkeep of the software that provides the functionality to a large range of products in use by a large number of people. I certainly hope it’s more than Microsoft has assigned to getting Marketplace addons updated
Great idea, it will never happen sadly because it would open up the ability for logi to not have full control of the limitation of their hardware if they choose to have standard/deluxe versions.
Example with Canon cameras that use the same die for many models of their cameras, example the high end camera bodies have the same ICB as lower models but use firmware to make the low and hi end models. A hacker once re wrote code on firmware for a lower end camera and essentially people had a much higher end camera based off the hack. I think manufacturers do not like there softwares and firmwares in the hands of you and I. Just my 2 cents.