gCal events that don't block whole day still shows the day as available but show no slots to book - bad UX

[Valentina R]

Example here. The product has duration of 8 hours, availability daily 9:00 to 17:00. One staff with gCal event on 12.10.2020 from 14:00 to 15:00.

The day is clickable and shows ‘Selected date is available’ (WRONG), but after clicking it, there are no slots (CORRECT - there should be no slots).

Reported here.