I made the mistake of not testing this on The Forge since version 1. I was able to reproduce your double tab issue very easily, but only once I played around in The Forge.
It seems for some reason Forge loads the javascript esmodules differently than how it does for my local server. Not sure why, but I’m aware of it now.
Anyways, if you update to 2.2.0 you will have a much better experience.