Event notification fires after being deleted

[pudup]

Checklist

• [X] I can reproduce the bug with the latest version given here.
• [X] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [X] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [X] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [X] This issue contains only one bug.
• [X] I have read and understood the contribution guidelines.

Affected app version

1.0.3

Affected Android/Custom ROM version

Stock 13 Motorola

Affected device model

Moto G

How did you install the app?

F-Droid / IzzyOnDroid

Steps to reproduce the bug

1. Create a repeating event, in my case it's weekly
2. Make sure the event has reminders
3. Delete the event for a given day but not all
4. Reboot

Expected behavior

No notification for deleted event on the deleted day

Actual behavior

Notification fires to remind about the event after a reboot.

Screenshots/Screen recordings

No response

Additional information

Other calendar apps on the same caldav do not have this issue. Only happens after full system reboots. Does not happen during regular use.

Happens even if the app is reinstalled and resynced to the caldav.

[pudup]

I don't know if this happens with other event types, i.e. non repeating or whatever.

[Aga-C]

1. What app are you using for CalDAV synchronization?
2. What CalDAV provider are you using?
3. After you delete an event in Fossify Calendar, do you see it removed on other devices?
4. Was the removed event the first occurrence of the repeating event, or a later one?

[pudup]

1. DecSync via Syncthing
2. ^
3. The deleted event is reflected in other devices. It's also reflected in other calendar apps installed - Etar. In fact Etar doesn't give a notification for the deleted event but it does for events that exist and created with Fossify.
4. A middle event. Not first, not last.