This has to be the single most annoying thing about MSFS. I have ultra-fast everything and am CONSTANTLY plagued by these drop outs (with no fancy map addons running either). It utterly ruins the sim - as by the time you sort out all the dialog boxes (and re-enabled online functionality) your aircraft has lost the plot.
Yes - I’ve read/tried ALL the info and kludges out there - and it’s a Microsoft SERVER fault. Their posts in the “Helpdesk” are total BS.
This all started a couple of updates ago. All it requires is that MS/Asobo simply raise the threshold at which the these disconnects are trapped. It really isn’t rocket science - PLEASE FIX IT.