System and IINA version:

• macOS 10.13.6
• IINA 1.0.0 Build 100

Expected behavior:

Selecting an active crop-video filter and clicking on the remove button should remove the filter.

Actual behavior:

A "Removed Filter" message is displayed, yet the filter remains and is still active.

Note that the crop filter is displayed as "crop=:::" (no numeric parameters), despite video being cropped with the parameters that were specified in the interface.

Related: #2032

Steps to reproduce:

• Add a "Crop" video filter with parameters "200", "200", [blank], [blank]
• Select the filter
• Click the minus button

How often does this happen?

I added two misbehaving crop filters and they're both unremovable. This issue persists through restarting IINA.

Note that the negative (invert colors) filter behaves as expected. I didn't test any others.