INSERT OVERWRITE ISSUE WITH DEEPL

Hi colleagues.  I work with Trados 2021 and have this specifically annoying fault appearing when using DeepL  As soon as I paste a translated text passage from DeepL into a Trados target segment (CTRL V)  Trados changes into overwrite mode although I never touched any other keys and Trados is still displaying INSERT mode.  So each time I have to press FN key and INS to actually activate INSERT mode again.  Any clue how to solve this.  And please don't hint I should restart Trados...  :-).    Thanks for your help in advance !

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