Calendar sync locks TB 128 hard

[meinhardh]

Your environment

TbSync version: 4.11
EAS-4-TbSync version: 4.12
Thunderbird version: 128.4.xx and 128.5.1esr

Expected behavior

Calendar on Exchange 365 synchronises

Actual behavior

Presumably a single entry in one of my calendars causes the above software setup to lock hard on my Ubuntu 22.04 system. No interactions are possible with Thunderbird, a 'kill' (-15 suffices) is required. Hence I can't collect logs...

However, the same calendar synchronises just fine on a different system (Arch Linux, TB 115.14.0, tbsync 4.8, eas-4-tbsync 4.8). Regression?

Any idea how I can try and identify the calendar entry that makes 128/4.11/4.12 choke?

Steps to reproduce

...

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