So, a couple things with this.

#1 - Hireling already have a very low chance to have a leap behaviour. Characters with a focus on Unarmed have a 5% chance for each skill and an additional 5% to have all three, and characters with Acrobatic focus are the same deal but with a 12.5% chance. I can lower the chance on Acrobatic characters if you really need me to, but I'd prefer to keep it as is.
#2 - This is the first I'm hearing of the leap noise playing at full volume. I never did anything to any of the leap events themselves or the sounds they play, and they should be using the same sound events as the rest of the game. If them playing at full volume is a bug, it's one with the basegame itself.
#3 - Getting stuck on some maps isn't something I can fix. It's just something that happens with leap behaviours sometimes. Generally, performing a dodge into the broken Hireling has a pretty good chance of fixing it. From the title, I'll infer that this is happening with Offering hirelings specifically, which is strange considering they use the Abominations' animations for leaping and I've never heard anything of them getting stuck.

Thanks for explaining, i mean not the leap sound but the "landing" sound(this boot sound), it sounds like it played, like 4-5 times at once

That's strange, I've never heard of that bug before. I'll look into it, but it likely won't be anything I can fix.

no prob, boss, it looks like this sound doesnt affects by SFX slider AS WELL as Master volume, huh...

Also i found a salvation of leaping problem, just dont bring those maniacs into indoor missions! (HONH and such)