Cancel 5 Week meeting send cancel mail for each week

I have office 365 32bit installed. 
I create a meeting which repeats 5 times. 

1.10.2023-5.10.2023
then i cancel the whole series . The participants gets 5 mails that means for each meeting once. once for 01.10. second for 2.10. and so on. 

I cannot reproduce this on another pc.

i allready reinstal office

any ideea?