Hi Ben,
You are correct. The form window is triggered because of the formtoggle, even when that formtoggle is not relevant.
Currently, form commands anywhere in a snippet will trigger the form window. This applies even when dynamic logic (like {if} conditions) would hide those form commands in the snippet preview.
There isn't a way to prevent this right now. We want to improve it in the future, but, there is no timeline for it currently.