When add-on with duration exceeds available time, it jumps to first slot in the day

[Valentina R]

Example here. The availability is from 12:00 to 16:00, duration and interval 1 hour. When selecting the slot at 15:00 and then selecting the add-on with the extra hour, the chosen slot jumps to 12:00 (first available in that day). Instead, it should either jump to the previous slot or show a warning of no availability.

Reported here.

[Valentina R]

Even in case if it jumps to the next available slot, like in this case, it should show some warning to the user so that they know that the start time is not what they initially selected.

[Valentina R]

Another user reported this. Any news? A simple warning would be fine.

[Valentina R]

Issue #638 was marked as a duplicate of this issue.