Anyone had an issue with a TranzX dropper? My son's is acting like a suspension post. It'll drop and stay put etc as per normal, but with extra effort (i.e. me sitting on it) it'll act like a suspension post i.e. it'll give and return to the same point it was set, you could probably market it as a feature not a bug, but I found it disconcerting, and the lads says it's a bit off putting. Pulled it apart and gave it a service and nothing looked amiss, but the issue remained after reassembly. Looks like it has a bit of a bend in it anyway so will prob look for a replacement, but if I can fix it that'd be good.