Issue with error validation not updating correctly on continued use

[arrenv]

Description

Issue with validation discovered when testing #3852. As described here - #3852 (review)

Expected behaviour

• The validation should be accurate when fields are updated.

Actual behaviour

• There are some inconsistencies in what triggers the validation (usually it's any change to the input but sometimes I had to manually click Fix it to see the errors number update) but I can't really determine the steps to reproduce. Here's a video of it happening (notice the first funding source updates the number of errors on change, whereas for the second one it doesn't)

196905354-552c5345-3e6d-4edd-8fa1-db708389678d.mov