This seems like an extension of this issue from the past:
The difference here appears to be that the view is filtered on a lookup column (specifically a lookup formula column from a User lookup).
I can click the plus sign, but I’m unable to enter any data for the record because the record is immediately filtered out of the view.
Some possible solutions:
- It would be ideal if the add record focused on the record, preventing it from being filtered out until data was entered.
- Another solution could be to pop up a form view for entering records in this scenario.