Appointments automatically cancelled after confirmation

[ilseroster]

Hello
When an appoitment is booked, the user received a cancellation message straight after booking. I have already activated the "confirm/cancel button timer". It does not happen all the time, but it is not limited to certain domains either. Thank you!

[nicoletflr]

We have the same problem here! Sometimes the cancellation is immediatly after booking, sometimes random. When I contact the 'cancelator' they were surprised as well.

We run Nextcloud 30.0.11 and Appointments 2.4.6

[SergeyMosin]

This bug is very hard to track down, mainly because of the lack of details. For the next release, I'll refactor the confirm/cancel flow and will add something like "Log Cancellation Details" debugging option, so there is info to analyze on how the "unwanted" cancellations are triggered.

[nicoletflr]

Thank you so much! If you need details that I can provide in the current version, please let me know!
best, Nicolet

[SergeyMosin]

v2.7.1 includes the following anti bot/ai/scanner techniques for preventing auto cancellations/confirmations:

• 1.25 seconds button inactivity delay (bots usually do not wait that long)
• Page visibility check, no action can be taken if the page is shown in the background (bots don't usually have displays)
• Double POST and COOKIE verification (most bots/scanners do not send POST requests and/or COOKIEs)

Also added a new Debug Cancellations debugging option in Appointments > Settings > Advanced > Debugging > Debugging Mode. If you see any more unwarranted cancellations, please enable the Debug Cancellations mode and when an wanted cancellation happens please provide a report that will look something like the image below...