Bookings showing wrong time slots

Hello,

I have multiple problems with MS Bookings. Scheduling times for services seem to be completely off. The booking page shows available slots that are already booked and on the other hand misses slots I am actually free... When my clients book the services available the get an error that someone beat their slot.

I have created a booking page with the following business hours:

It is set that clients can pick slots within these hours when I am free, I am the only staff that is available, and clients can't choose staff themselves.

I have two services available with identical settings except that one is for 30 mins and one for 90 mins.

Staff for the services should be bookable when available.

So now clients booked appointments with me, and I have a blocker as well set in my calendar for lunch as you can see here:

(the second user is just administrator that is not added as staff to any service)

However, my booking page shows the following slots:

As you can see I am available from 10:45 although my first session is from 10 to 11:30. On the other hand I am not available on 2:30 although I am free there actually. Also these slots change without making changes to my calendar. The tool seems very buggy and its unclear where those times come from. If you pick up one of the slots you get the following error message:

If you click "Find another time" all slots are gone

This makes the tool completely useless as all my clients are reaching out to me directly now or just do not book my time. I saw many very old threads with similar problems, so Microsoft seems to be aware of the problem but is not fixing it or providing an acceptable solution. Could someone please help me out how to fix this without creating everything again? I saw this as a resolution but seriously, should I send all our clients new links now? How unprofessional would that be? Hope we can find a better way together.

Best,