I did nothing and the application crashed (single user).
Before the crash the windows of SERP were blinking every ~12 seconds, I tried to record the video of that. After recording the video a minute or two passed and the application crashed. I have 2 languages english and lithuanian. I haven't noticed any language change on the interface, though it looks like the application is in the loop of changing GUI languages.
I have no idea how to report it.

2017-05-23 10:56:00 8.3 2017-03-27 (build 83250600)
..

2017-05-23 10:56:01 *** RELOAD UI FULLY ***

2017-05-23 11:14:10 AD *** RELOAD UI FULLY ***
2017-05-23 11:14:10 AD *** RELOAD LANGUAGES ***
2017-05-23 11:14:10 AD activate language ENG
2017-05-23 11:14:10 AD activate language ENG done
2017-05-23 11:14:10 AD activate language LIT
2017-05-23 11:14:10 AD activate language LIT done
2017-05-23 11:14:13 AD *** RELOAD UI FULLY ***
2017-05-23 11:14:13 AD *** RELOAD LANGUAGES ***
2017-05-23 11:14:13 AD activate language ENG
2017-05-23 11:14:13 AD activate language ENG done
2017-05-23 11:14:13 AD activate language LIT
2017-05-23 11:14:13 AD activate language LIT done

2017-05-23 11:14:20 AD *** RELOAD UI FULLY ***
2017-05-23 11:14:20 AD *** RELOAD LANGUAGES ***
2017-05-23 11:14:20 AD activate language ENG
2017-05-23 11:14:20 AD activate language ENG done
2017-05-23 11:14:20 AD activate language LIT
2017-05-23 11:14:20 AD activate language LIT done