I have a Zap from Google Sheets to google calendar. Every time a row is created or changed, it creates a calendar event. About half the time it works fine, the other half time it misses copying over certain fields (columns). It tends to be the same fields that get missed.
When I check the zap history the missing fields appear in the zap history but not in the actual calendar. I have asked support several times. They just tell me to refresh the connection which I have done and it's not helping.
One theory I have is that because these fields are generated from a formula, they take a second to populate and the zap is triggered before that happens. However, it seems unlikely to me that Google Sheets can’t run the lookup before the Zap is executed. Also, if this were the case, I wouldn’t expect it to show in Zap history.