SDL Trados Studio 2021 crashing & Multiterm looses connection

Silimar problem as https://community.sdl.com/product-groups/translationproductivity/f/studio/31102/sdl-trados-studio-2021-crashing?ReplySortBy=CreatedDate&ReplySortOrder=Descending#

I upgraded a few weeks ago to Studio 2021 and since then it is crashing regulary  at least twice a day - without any error message while working in the editor.

Multiterm also loses regularly the connection to Studio. Sometimes I can not add a new term to Multiterm (it is either just not working or Studio crashes while trying) or Multiterm does not show the existing terminology.

Information:

Studio 2021 Professional - 16.0.1.2917

Microsoft 10 Pro, Version 2014

Intel Core i7-7700