In a visual flow I am doing a record lookup on the opportunity object. I set the object as opportunity and when I am entering the filter criteria, the field I am looking for is not an option.
I have confirmed that the field exists. It is a formula field, but other formula fields are available. I can't find any difference between the two fields.
This happens in all flows, edited or new.
It works fine in a sandbox I spun up a few months ago, so maybe it's a system change?