I'll mention this here in case anyone happens to know what I'm talking about: While I was testing a level in 12.10, definitely remember encountering a setup with an updraft and gliders in which non-climbers would turn around, but climbers would continue. Considering there isn't a glider->climber transition, this seems like a bug, possibly related to the climber-swimmer behavior fixed in this version. As such, I wanted to verify it still occurs in this version before reporting it, but I couldn't replicate the setup at all, even in 12.10 - I should have saved the version of the level that exhibited it, in retrospect, but I thought it would be easy to recreate, and it was an undesired behavior for the level I was working on, so I altered the terrain so it wouldn't happen. Either I'm just remembering things wrong and it never actually happened, or it was caused by something other than what I thought was causing it, therefore causing the recreation attempts to fail. It involved an updraft transitioning into a sloped overhang, e.g. something like L2 Egypt block_04 or block_09.