illustrator CC 2018 (ver. 22.0.1(64bit) / windows 10 Falls creator
UI gets 'mangled', rendering it unusable, displays 'eating' each other or disappearing or not appearing, usually starts in 'control' area. Happens after various length of time, no special event triggering it.
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Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.
Ashutosh Chaturvedi | Sr. Quality Engineering Manager – Illustrator