that sounds good… I realy thought you noticed my comments about XMP mode some days ago 
Lots of users are not aware that the RAM is also relevant for that kind of error messages.
What I would recommend now:
fly some days with the current RAM setting. In special also with your settings you want to have, where you get not stutters, etc.
If you no longer see that message after some days with your setting, then we have the final Root-Cause.
You can also try then a more faster profile, but realy only if all works fine with the 2400’er.
I assume its the “JEDEC #8” profile what’s currently choosen. JEDEC means standart, no OC etc. …
You can see the current values within the “memory” tab of cpu-z.
We also see there are two XMP profiles and you choosen former the profile 1 : 3200. If that not works stable, you can then try the profile 2 , which is in your case seemingly more safe profile ( freqency wise ). All others needs manual settings, which you can try - but I not recommend that if you unsure what you do. Also note, that the little performance beneffit might the “stress” not worth 
These “freeze” when you exit MSFS is a different topic and I remember some reports and also noticed that some times, but very rare. As example I remember this topic short while ago: