This is likely happening as you are trying to say find events whose date = current cell’s date. This will only work for events that occur at the exact same date AND exact same time of day.
So when you display the Events in the repeating group, you will need to make sure the Event falls within the date range of that specific day
Here is a quick example of when a date is clicked on the repeating group calendar:
Display List of Events in Repeating group
Source: Do a search for events
Constraints
Start date/time > current cell’s date:change hours to 0 change minutes to 0, change seconds to 0
Start date/time < current cell’s date:change hours to 23 change minutes to 59 change seconds to 59
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