I upgraded to 12.1 this morning and started having various problems. The first problem was slowdown/sluggishness. I blamed my Mac at first because I had a long file copy running in a separate workspace window. However, after the copy finished the problems continued. I started an Android debug session and set a break point. When I went to edit the breakpoint I found that I could not clear the condition checkbox so I hard-coded the literal "true" as my condition to ensure the breakpoint would always hit. I then finished debugging and went to stop the debugger. The debugger hang indefinitely. This is a problem I'd noticed prior to the upgrade and I usually reinstall the apk to free the debug process. This time when I clicked the run configuration to compile and run my app it hang indefinitely, I had to forcibly quit Idea. I'm relaunching it now but I wanted to know if anyone else was facing similar issues.