The collections pane keeps jumping to the parent folder and won't let me scroll

Problem:
I often add an item to multiple collections/folders. To do that, I scroll down in the collections pane and then manually drag-and-drop the item into a collection/folder. But when I attempt to do that, the collections pane won't freeze where I stopped scrolling; instead it jumps to the collection/folder that I'm currently in. (I have hundreds of collections/folders, so this is incredibly frustrating.)

Question:
Is there a way to disable the feature that automatically jumps to the folder you're in?

(I'm using Zotero 6.0.18.)
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