@Chrispy0530 You may check temperatures on your CPU and GPU (maybe they heat too much and constant stress causes hangup issues, maybe it's time to attach thermal paste again), try with Command Prompt (executed with Administrator rights) and sfc/scannow command, it repaired some files for me as Microsoft Store modified some integrity packages on its own during disconnects.
I remember that I tried other things as well: adjusted in-game graphics options (especially Anisotropic Filtering to 8x, 16x one caused some sort of instability) and graphic driver's performance in nVidia Control Panel (Power management mode set to "Prefer maximum performance", rendering set to my GTX 950 in order to prevent integrated Intel HD4600 card from doing anything in the process), changed power plan in Windows 10's Power Options to High Performance (Control Panel > Hardware and Sound > Power Options), adjusted Graphics performance preference for Win 10 desktop apps and set "High Performance" for my all PSO2 installations as I operate on 3 platforms for safety purposes (Settings > System > Display > Graphics settings), as well as added an exception for pso2_bin folder to Windows Defender and antivirus software. I thought that maybe 471.11 nVidia driver caused issues but it's good so far.
Hope that SEGA gets this issue acknowledged fast and implements any fix because they'll lose more players due to this bug, it's really annoying and game-breaking experience leaves a bad taste. It's not someone's hardware issue if more people experience this state on any platform (I had crashes on every single one, Steam, MS Store and Epic Games Store), not a single hangup since July 11th.