Hello guys,
with the new update(s), I perceived that the dimensioning function seemed to switch on automatically. I did not intend to dimension something and also was not hitting the shortcut … only hiding objects. The cursor for dimensioning (blue circle was active)
My browser is Microsoft Edge
In case it helps I can repeat it later with a video recording. In case you have some hints to provide you with more precise info, let me know 
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Best,
Alex