Same here,
MacBook Pro 13" 2020 10.15.7
btw. if you are loading you connect via USB-C ...
my Problem:
Connect USB-C on left side upper one (tested on left side all every the same) to LG UltraFine
- working
- finishing disconnect the monitor all windows are collected on internal monitor then close the lid => pffft sound appears (seems like the fan's are spinning up fast) and restart with error Intel CrashLog recorded due to unexpected reset
Is done (on 90% of the lid closings)
the problem seems to get worse since apple has now the own monitors again, with the release of these this problem occurred
connecting external monitor (on prev. MacBook Pro 13" Late 2016) display stays black disconnect / reconnect then it sometimes recognise the montior (best way connect close lid, wait until recognised open lid again ....)
another thing: other people have the same problem with docking stations connected to the usb-c and restarts with error
and I think its a os problem / something is not working as it should usb-c driver , only thing what I recognised is the new USB-C connectors are, how should I say "cheap" first they are fitting tight but after a few connects they are getting widened very fast...
quality is not getting better on the apple products
I hope for an OS update soon, otherwise if it would be a hardware problem... then it will get interesting