Anyone here really good with Monstera’s ? I have experience with mini Mon’s, some experience with deliciousa, some Swiss cheese (slower). But now I’m trying to propogate this stunning Standleyana Albo and having problems.

I have and I'm struggling. I had root rot in water so I switched my last attempts to a glass filled with perlite. Just enough water in the bottom to make sure they didn't dry out.
I believe I also had some hormone jello for rooting on them. And today I find a big black stem.

Obviously I'm drying the edges, letting them callous before placing in water or perlite.

I'm gonna go back to water for this round but I was hoping someone would have some specific ideas about this type of Monstera(standleyana albo).