Custom activities not remembering input type selected v3.6

## Description
On v3.6, for custom activities, when I change the input from default to JavaScript, then deselect the activity, select it again, it's back to default, it doesn't seem to be keeping the javascript selection. The built in activities works, but none of the custom activities want to remember the selection.

Here with a video showing the issue as well: https://workplace.360platforms.co.za/s/CtPdjHxdFFrXjoN