I create an "URI Pattern Value" measure as yo can see. Later I create a BT with this measure as filter. I want to list all URIs excepting those start by "muro-api/V1/desktop/chats" and so on (muro-api/V1/desktop/chats.*), but result isn't that. I tried with all negate options (not starts, not ends, not contains, not equals, not regex) on several tests, and it doesn't work. Is it a bug? Maybe I'm doing something wrong...
I've never had luck with those - no idea if it's a bug or just not many people actually understand how to use them. Regardless what I recommend is to make your filter measure regex/pattern actually match what you want to filter out and then set the lower severe threshold to 0. This is saying only include these PurePaths in the BT if this pattern does NOT show up.