The new tick flow appears to not persist the ascent grade like the old tick flow did. Instead, the ascent grade is inherited from the route, meaning it can change later whenever the route grade changes.

In my opinion, this is a major bug in terms of potential user frustration, confusion and ultimately loss of information.

Due to this issue, I recently gained an full grade of onsight ability thanks to nothing more than some guy breaking off a hold after I've climbed the route and subsequently upgrading the route. Based on this observation, I surely hope that the new behavior wasn't actually intended.