I am pleased to say that the fixes in development release 1.26.1.5712 that have fixed the Plex Media Server crashes with 0xc0000409 in ucrtbase.dll have now been ported back into the 1.25.9 beta and the release of 1.25.9.5721 made available yesterday has these fixes
Release Notes:
Fix for Window related EventSource crashes (#13437)
