I'm in the process of creating a join from a FC to a table that has a definition query (the table has 12 rows, but the definition query pares it down to 3 rows).

When I hit the Validate Join button, I get these results in the Message window:
Checking for join cardinality (1:1 or 1:m joins)...
A one - to - many join has created 12 records from 3 matches.
The input table has 3 and the join table has 3 records.
I don't think that information is correct. The join is 1:1 and it will result in 3 records in the source FC (same as before the join). But the Validate Join message says differently.
Is that a known issue?
Thanks.
ArcGIS Pro 3.0.3; mobile geodatabase.