I'm looking for a bit of reassurance before reporting a bug(s) in the search builder. On my own site, we have a custom field 'Course Code' which we've previously used for regex searches in the search builder.
However, recently (or since this time last year!) it seems to be broken. I'll attach a series of screenshots below to illustrate my point.
I have attempted to reproduce on the CiviCRM Demo site by searching in Search Builder using regex for the postal code field. It seems to broken there too. Screnshot at bottom of page.
To summate, am I being an idiot, or is the regex search in search builder broken?