When exiting the minecraft launcher by pressing X on the top right, the launcher will close normally without any errors, but after 3-5 seconds Minecraft.exe crash report will appear in the event viewer and reliability monitor.

Faulting application name: Minecraft.exe, version: 1.0.1.0, time stamp: 0x66f482c8
Faulting module name: libcef.dll, version: 127.3.5.0, time stamp: 0x66ba83b2
Exception code: 0x80000003 

There is no error in the launcher log but there is one in the cef log.

[0105/204505.731:FATAL:check.cc(376)] Check failed: false. NOTREACHED log messages are omitted in official builds. Sorry! 

Link to the video: https://streamable.com/rkr8w3