PluginToolbarButton icon won't update in next gen preview

The change of a PluginToolbarButton’s icon property isn’t reflected on the toolbar in a Studio installation that has the Next Gen Studio Preview beta feature enabled. Switching tabs doesn’t refresh the icon. All other beta features were disabled, and a separate test with most enabled (excluding Texture Generator) did not show a difference.

OS: Microsoft Windows 10 Pro 10.0.19045 Build 19045
Roblox Studio: Version 0.697.0.6970925 (64bit)

This video shows the bug:


Here’s the testing plugin I used:
BlinkyPlugin.rbxmx (1.4 KB)

There is an existing bug report stating the same issue, but it was made years before the next gen studio preview was released.

Expected behavior

I expect PluginToolbarButton icons to change when modified by a script after the button has been created.

Here’s a video in the old studio interface where the correct behavior happens:

Hey, thanks for the report! We’ve identified the issue and the fix should be live, please restart studio and try it again. Let us know if it still isn’t fixed!