cal.com "Edit booking" doesn't allow a new time which overlaps old time

Issue Summary

Someone booked a 60 minute slot via my cal.com event link, but then pointed out they wanted to move it 15 minutes later; however the "edit booking" feature doesn't allow this.

Steps to Reproduce

Confirm a 60 minute booking using an event type which has Time-slot intervals set to 15 minutes. (In my case, the booking was at 11:30am.)
Go to https://app.cal.com/bookings/upcoming
Click on "Reschedule"
Click on "Edit booking"
Select the same day as the original booking time
Observe that the times available for rebooking don't overlap with the original time, so I can't shift the original 60 minute booking at 11:30am earlier or later by 15 or 30 or 45 minutes:

Expected behaviour

When rescheduling, the availability algorithm should consider the existing booking as (provisionally) cancelled just for the purposes of editing its time, in order to avoid the old time incorrectly overlapping with potential new times.

Technical details

Google Chrome Version 101.0.4951.41 (Official Build) (64-bit)

This is clearly a server-side issue, but happy to provide more client details if someone needs them.

May 03 '22 11:05 aspiers

Hi, @aspiers, I tried to reproduce the issue. It works fine for me.

May 04 '22 07:05 hussamkhatib

That's strange, I can't think of a reason why it would work for you and not me. This highlights why we need a solution to #1171 - it would eliminate the guesswork when slots are unexpectedly unavailable.

May 15 '22 11:05 aspiers

I just hit this exact issue as well.

Some one booked 2-3pm

We agreed via email to reschedule to 1:30pm, but I wasn't able to do that:

Screenshot from 2023-01-11 11-35-19

This is using a CalDAV calendar on Nextcloud.

Jan 11 '23 11:01 jdaviescoates

Although actually I don't think this has anything to do with editing or rescheduling bookings, but perhaps it's something to do with with event types that allow the booker to select the time? Because I just had a look at completely empty day and it's exactly the same, bookers can only select 60 min meetings that begin on the hour:

See for yourself here: https://cal.com/jdaviescoates/quick-chat?duration=60&date=2023-01-19

Jan 11 '23 11:01 jdaviescoates

I guess you can't display every minute of the day, but there definitely needs to be a UI improvement here somewhere. Perhaps a button that says something like "show additional 1/4 and 1/2 hour slots where available" or something (ideally better/ shorter than that)? :shrug:

Jan 11 '23 11:01 jdaviescoates

perhaps it's something to do with with event types that allow the booker to select the time?

Ah, but doesn't sound like OP was using that feature. So I think it's just a general UI bug/ challenge.

Here's looking forward to you finding a nice solution to the challenge! :raised_hands:

Jan 11 '23 12:01 jdaviescoates

Just hit this again. It's frustrating that 60 min bookings can seemingly only begin on the hour. I just wanted to reschedule a 10:30-11:00 meeting to 10:30-11:30 but of course was unable to do so because of this issue :(

Jan 12 '23 21:01 jdaviescoates

increased priority to high. will try to find someone