Office365 recurring event

[bodothebest]

Your environment

OS: Linux Mint 21.1
TbSync version: 4.3
Thunderbird version: 102.11.0

Issue

I am syncing an Office365 calendar where there is an event recurring "the last working day" of every month and the behaviour in Thunderbird is not what I'm expecting

Expected behavior

To see the event only in the last working day of the month (for instance this June is gonna be Friday 30th, in July it will be Monday 31st)

Actual behavior

The event is replicated on every last Monday, Tuesday, Wednesday, Thursday and Friday of each month, so I see it 5 times instead of one.

Steps to reproduce

Create in Outlook an event recurring monthly on the last working day of the month and sync it with TbSync.
The same happens if you choose the last NON working day, only with Saturdays and Sundays.

Thank you for your support and for this really useful plugin!

[LmeSolvision]

The same issue happens on the First work day of every month.
I also get 5 occurrences.