Hi, Reach_Adrian
We are seeing the exact same issue with UE5 EarlyAccess and RegEx.
I’ve added a question on my own as I couldn’t find anything similar at the time of writing (link here).
I just wanted to let you know we are struggling with the same and we still have no resolution.
Waiting for Epic to respond and in the meantime, we will try to replace our regex usages with non-regex equivalent 