Wicked 10 is still solvable even with this bug. I know, because I originally didn't solve the level the "intended" way all those years ago when I was a kid.
https://www.youtube.com/live/L9L3fBn5ilo?si=FH0vEMdKnxyfZx_d&t=6641
Dos Lemmings, but the solution should still work on both NL and SLX.
Anyway, this climber detecting the ceiling sooner than he should and falling back down rather than successfully climbing over also happens in SuperLemmini v.104a, and I agree that it's a bug when he's able to climb over fine on Dos and all the other original engines.
https://www.youtube.com/live/L9L3fBn5ilo?si=FH0vEMdKnxyfZx_d&t=6641
Dos Lemmings, but the solution should still work on both NL and SLX.
Anyway, this climber detecting the ceiling sooner than he should and falling back down rather than successfully climbing over also happens in SuperLemmini v.104a, and I agree that it's a bug when he's able to climb over fine on Dos and all the other original engines.

I'm definitely learning a lot about Sonic from the various comments Flopsy has left on my LP videos though. I appreciate them very much and remarks as to whether my solutions are intended or not!
This is why some levels have two replays attached. My general approach is to just solve the level normally without opening up the talisman to see what it is and either I get lucky and got the talisman on my first blind playthrough or I don't get the talisman. If the latter, then I simply retry the level after solving, open up the talisman, then try to obtain it. Sure, it's faster to just open up the talisman to see what it is first, but that's just not the way I roll with these optional talisman challenges
Well, that's my fault for not letting a Lemming get underneath to see if it kills and/or not using CPM, but you already know me with intentionally not using the latter to save time and to make things easier for myself
Timing isn't too tight at all with making the splatform before using up all the swimmers, made easier by how you don't need everyone to use both exits.
I honestly was so relieved to finally solved the level after working it out for about 1.5 hours. I figured out how to get up the level on the right side pretty quickly, but it took a very long time to find a solution that works. Great level, but wow, didn't think skills but especially getting up the level with both entrances be so problematic! 

I do like the level and its solution, just frustrating to get right, though with the miner/builder combo it's always precise.