[Tohopekaliga]

I see what you mean. The main part that has difficulties with pinch zooming, as far as I can tell, is the item list on the left.

I'll see if I can tinker with it to have it work properly but in essence, that happens because you can drag & drop that list, so when you try to pinch it grabs one of the things under your finger.

It's a bit fiddly, I know, but if you can put your fingers down outside the list, it should work. Also, if there's somewhere outside of the equipped list on the left that has trouble, please let me know, because I can't find it.