Regex step not obeying uppercase in expression

I am trying to identify when a cell’s text is entirely uppercase and am using the assumption that if the first three characters are uppercase, the rest will be too. In this case it’s a city name.

This should work and does on regex testers, but is not in Parabola.

^[A-Z\s\.]{3}

Looks if the first 3 or 2 (accounting for a space or period) letters are uppercase. I am then replacing those first three characters with a symbol so I can then filter by the symbol in the next step.

Hi @Reid_Sheldon - Happy to help! It looks like that expression should work with our Regex step. Could you please email us at help@parabola.io and send us the link to the Flow so we can take a closer look?

okay, sent. thank you