Project panel bins won’t expand, checkbox column magically appeared, disclosure arrows unresponsive

Hi everyone,

I’m running into a strange issue in Premiere Pro and haven’t been able to fix it.

In one of my projects, the view and functionality in the project panel has gone wonky. For one, a checkbock has magically appeared immediatedly after the furthest left display, the color label. I did not add this, and in fact I dont even know its purpose or what the display is even called.

Also, the bins in the Project panel now will not expand at all. Here's a summation:

• A small checkbox appears to the left of every bin and clip

• The disclosure triangle stays pointed to the right and does nothing when clicked

• The bin behaves like a selectable item instead of a folder

• Double-clicking a bin opens it in a new tab instead of expanding it

• Project panel is already in List View

• Other projects behave normally... only this one shows the issue

Here’s what I’ve already tried:

• Resetting the Project panel view preset

• Toggling between List / Icon / Freeform view

• Resetting the workspace

• Resetting all workspaces to default

• Restarting Premiere

• Restarting the computer

None of these steps have fixed the behavior.

I have no idea how this even happened in the first place. 

The only visual difference I notice is that this problematic project shows a checkbox column that I can’t remove, and ever since that appeared, bins no longer expand.

Has anyone seen this before?

Is there a hidden metadata column or mode that forces bins into a non-expandable state?

Any advice would be greatly appreciated.  I’ve never encountered this issue before.

Thanks!