Zoho calendar sync: items randomly disappear

[rfc2822]

See discussion. I was able to reproduce the problem, however I had to wait a day to do so (which is inconvenient for analyzing).

Discussed in #2041

^{Originally posted by prosperot February 28, 2026}
Since the last 2 updates, syncing from ZOHO calendar via davx5 skips items. When calendar appointments are created (on my macbook via ZOHO calendar or Apple Calendar) all new items are synced via davx5 to my samsung S23. But a few sync moments later, some of these items are dropped and no longer synced (and also not anymore shown in the syn log). They are however still visible in Zoho calendar and on my macbook, but not anymore on my Samsung S23 (that uses davx5 to sync).

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Internal tracking of issues reported to Zoho: https://github.com/bitfireAT/davx5/issues/829

[rfc2822]

Today it was not reproducible – events from the last time when I tested were still present and didn't vanish when syncing new ones. Maybe fixed on server?

[rfc2822]

See #2041 (reply in thread)

Will be reopened if there's clear indication that this is a DAVx5 problem.