Hi,
I did a full flight to VMMC with FBW 320 dev (file download from github 5 Jun, did not install from marketplace). Have enabled built-in live traffic and weather.
When approaching airport, ARC page of ND stop update and the outer ring turn red but the Rose NAV continues to work. But when getting nearer to airport, both ARC and NAV pages also freeze with outer ring turning red. Anyone got this before?
I updated my dev version yesterday as well (having not updated it for a week) and noticed this ‘bug’ during my flight.
I was able to correct it by cycling through VOR-NAV-ARC-Plan until it reset itself, leaving it for a few seconds on each setting.
I guess such ‘errors’ are to be expected in various builds of the dev version and usually I find subsequent builds have rectified temporary problems that occur.
Edit UPDATE: Looking through the #support channel on the FBW Discord server, one of their moderators said there that the red ring usually denotes a mod conflict as mods were not usually up to date with their dev version of the aircraft.
Yep - this sounds like a mod conflict with a really old version of the Salty 747 (not 100% sure) - definitely update any aircraft mods in your community folder.
Ok, let me remove other mods and retry.
Do you have navigraph installed? If so, sometimes outdated navdata can cause this issue as well. As of this post the beta application is version Beta 26, and the AIRAC cycle is 2105 Rev 4. with Navigraph In-game panel of version 0.4. So if you do use Navigraph, make sure you keep it updated at all times.
Also, you can install FBW A320 using the Installer, much easier to install and update than downloading from Github.
No navigraph.
I retried the same flight, removing all other mods heavy 787, working title.
Did not happen in the air, but on the ground after landing. Live weather radar also not showing all the way. Will wait for future updates by FBW team 
I think Asobo already updated this weather radar to only show Percipitation and not clouds. It’s written on their latest release notes. So I think even if you have a lot of clouds but no rain, the radar won’t show anything since they’re reworked to only detect rain.
I know a friend of mine also had this red ring before… But surprisingly, I never have… I don’t know if this helps or not (maybe not), but I noticed your FD is off. The only difference between mine is that I always turn on FD as soon as I spawn at the gate, and I tend to never turn it off… ever… or at least until I’ve parked at the gate. But like I said, maybe this is just coincidence and probably doesn’t help at all.
ok, that’s the reason for change to weather radar.
I normally turn FD off to perform final touch down for RNAV approach. When ND freeze, only the 20nm and 10nm range are affected. 
I keep FD on even on RNAV approach… I need the FPA/TRK bird on my PFD.
Bird will still be there, with FD, extra pair of wings are added to the bird making it hard for me to see the bird
Think I found the issue related to this freezing ND, related to TCAS:
So is this something to do with the TCAS?
Seems so according to the git issue, when you fly with live traffic in areas with large number of live traffic.
I haved rolled back to end apr dev version, problem did not occur with same busy flight. But that live traffic fighting w me to land 
I have this issue today, from a day to another because it works perfectly yesterday (TCAS and WC too) and I did no single modification in the sim’ or in the community folder between this two days
Strange…
Waiting now SU9 and some mod’s update…
