I create a display with styled alert and token in it.
If i keep island plugin form opened and submit Reset form, input in form_state is good, but not values which are the component values.
Steps to reproduce
See screencast which test 3 paths:
First, let open component form, open and submit reset : FAIL
Second, close component form, open and submit reset : FAIL
Third, close component form, refresh page, open and submit reset : SUCCESS
Reset is a devel (display_builder_devel) feature, so not a priority for now, moved to beta phase.
For now to fix, simply delete and re-create the instance.