weekly repeat time off

HelLo,
There seems to be an issue with repeat weekly time off.
In calendar admin i see the appointments that are repeated every mon/tues/wed, etc.
But when I want to book an apppointment for let say monday 17nov morning 7am, it is crossed out, and yet I do not have any time off or booked appointments on that day. The time off I booked weekly is on Tuesday 7am-8h30am.
It seems that the time off that I scheduled weekly crosses out the same hours but on a daily basis.

Thanks

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