Appointments do not show in the app but are created in the synchronized calendar

[MichaelMeierOneFive]

Checklist

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

Affected app version

1.8.1

Affected Android/Custom ROM version

Orphene OS, release 2025112100

Affected device model

Pixel 7a

How did you install the app?

F-Droid / IzzyOnDroid

Which calendar service or provider do you use, if any?

Synology calendar (running on private Synology NAS)

Which sync adapter app do you use for calendar synchronization, if any?

DAVx5

Steps to reproduce the bug

1. Create a calendar for each of two users on a private NAS (Synology)
2. Add the two calendars to be synchronized through DAVx5
3. Activate the CalDAV sybchronization for both calendars
4. Select both calendar accounts
5. Create an appointment in each account

Expected behavior

If both calendars are connected and synchonized propperly, I expect to see the appointments of both calendars in the app and to be able to create, delete, and change them.

Actual behavior

Both calendars are connected and synchonized propperly, as DAVx5 connects without errors. Moreover, I can create appointments for both calendars in the app and they are thus synchonized accordingly. However, only the appointments of one calendar are visible, whereas those of the second calendar cannot be seen.

Screenshots/Screen recordings

The appointments of calendar1 are visible, whereas those of calendar2 cannot be seen.

App_calendarView.pdf

App_settings1.pdf

App_settings2.pdf

DAVx5_calendar1.pdf

DAVx5_calendar1_settings.pdf

DAVx5_calendar2.pdf

DAVx5_calendar2_settings.pdf

Thunderbird_calendarView.pdf

Additional information

No response

[naveensingh]

Are those events from the second calendar visible in other calendar apps (e.g., Etar) on the same device?

If you do not have any other calendar app, please install Etar to help identify the source of the problem.

[MichaelMeierOneFive]

I just installed Etar and yes, in Etar the events of both calendars are visible. I attached two print screens, the first from Etar and the second from Fossify.
Please note that I am happy to use Etar and thus this issue is not urgent for me. However, if you like to work on it, I am happy to assist as much as I can. Just let me know what I can do and what information I may provide you with.

Etar.pdf

Fossify.pdf

[naveensingh]

My guess is that there is at least one event (maybe added recently) in your second calendar that Fossify Calendar is silently failing to read from the Android calendar database, which in turn causes the remaining events to fail too. #268 is similar in this regard.

If possible, could you export and share that second calendar here or send it to hello@fossify.org (with personal information redacted)?

[MichaelMeierOneFive]

Sure. as I am unable to uplead the ICS file of my redacted calendar, I mailed it to you, putting the title of this issue in the subject.