Stream Deck 'Run Real Javascript' Action always revert to Apple Script from SCPT File

Describe the bug
I'm trying to add a 'Run Real JavasScript' action within the Stream Deck section. For the Source Type, I choose "Source Type: Real JavaScript" and type valid JS (confirmed as I use the same script in a menubar item action). When clicking away/saving, the Source type changes to 'Apple Script from SCPT File' and thus the action does not behave as expected.

Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):
Stream Deck (Beta)

Original before saving:

After saving:

Device information:

  • Type of Mac: MacBook Pro 16" (2019)
  • macOS version: OSX Catalina 10.15.7
  • BetterTouchTool version: 3.831

Additional information (e.g. StackTraces, related issues, screenshots, workarounds, etc.):