Google Calendar Integration is Inconsistent (problem)

I work in a musical ensemble that uses Monday.com to track events (performances, etc.). We have used the "official" Monday -> Google Calendar integration with the automation "when an item is created or updated, create an event in Google Calendar and sync future changes from this board" (as seen in the screenshot below)

We have run this automation on 100s of events already (and it mostly works), but we started noticing that out of the many events we create, a few of the events just don't show up in our Google Calendar. some events just don't sync right away, but some of them take a while to sync or even don't sync to the calendar at all. This Google Calendar is shared with tens of musicians, and if an event - a rehearsal or concert- is not showing up at all, this is a huge problem.

Does anyone know how it can be fixed, & how can we be sure that all the events really do get synced into the calendar? (Right now we are being extra cautious and we check that each event as we create it on monday, that it gets created in the calendar as well).

Monday

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