I found the issue!
I had allowEditOn single click, and for whatever reason that makes the dropdown disappear as soon as it opens. If I switch it to double click or long click it works how I would expect it to.
What's weird is that to open the dropdown it only takes a single click, but my other components it takes a double click.
Is it possible to change this setting based on the column so I can only apply the double click to the dropdown? Thanks!