ArcGIS Pro 2.6
I am encountering an odd error when rematching address in arcgis Pro. Unmatched addresses is nothing new for the data I'm working with, and to try and speed up the rematch process I edit the values in the Single Line Input field save the edits and rematch. Utah addresses are easy to fudge: if an address like 6349 W 7380 S misses, I run a little python script that rounds it to the nearest hundred so the Single Line Input value is 6300 W 7400 S. I have a POI role in my locator for those rounded values so that is a good match.
The problem I'm encountering is it works to a point. I select a number of unmatched addresses, update the Single Line Input field and rematch. I can do that several times and then I get this error:

The locator and all the data I'm working with is all local and for that matter, I am signed into AGOL for my Pro License. It seems random; one time it'll error out with 120 records selected, other times with 50 records selected. I have a machine with Pro 2.5 on it and when all 500 + records are selected, they rematch just fine.
If I manually click through the unmatched records with the green check in the rematch pane, I rematch all day long, but not in bulk. I have a big geocoding project coming up and I know there will be tons of bad addresses which is why I testing this approach now on smaller address tables.
@BradNiemand