Now that's weird, you're not the first one i see reporting issues with bank stacking from MrPlow, but everything still works fine for me, I'm using Onebag suite.
Bank stacking in MrPlow stopped working for me and my significant other something like six months ago. Various deleting of saved variables failed to help. As you say, some people have the problem, some don't.
Since Wobin has been mostly absent lately and MrPlow's code was more complicated than I really wanted to try to understand for one fix, I decided that writing my own was the way to go.
It was fun... and, as a bonus, mine generates a lot less garbage than MrPlow. :-D
I just generalized the stacking function so it can stack from an arbitrary group of bags to another arbitrary group of bags.
This allowed me to add in bag/bank compression: "/compress", "/compress bank"
It can refill stacks in your inventory from your bank: "/bankstack reverse"
It still can't replace MrPlow, because it doesn't sort bags. This is unlikely to change, because I use Baggins. If someone wants to write an efficient bag sorting algorithm and send it to me, I'm all for that.
(Oh, and the FuBar plugin was updated to allow click-access to all this.)
BankStack is totally awesome and I love it and I love you Kemayo!.
[04:50:11]<Fin> Kemayo: I have a request for BankStack - could trade materials that don't fit in trade-specific bags be stacked next to those bags? [04:50:47]<Fin> Kemayo: "next" as in, uhm, if you were using Bagnon or summat - I guess sequentially next? I'm not sure how Bagnon figures out the order
[05:09:20]<Fin> Kemayo: BankStack seems to have a bit of a bug dealing with multiple different types of "Scroll: Create Signet of Beckoning" (I have two in my bag, one fire, one stone, and they keep swapping. I can't stop this)