Putting "Size and Position" above "Chroma Key" causes the filter to break

What is your operating system?
Windows 10

What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?

Shotcut version 20.11.28

Can you repeat the problem? If so, what are the steps?
(Please be specific and use the names as seen in Shotcut, preferably English. Include a screenshot or screen recording if you can. Also, you can attach logs from either View > Application Log or right-click a job and choose View Log.)

Putting “Size and Position” above “Chroma Key” causes the filter to break.

How it should look like:

How it looks like when “Size and Position” is above “Chroma Key” in filters

What happens when it “breaks”?

Updated the post. You can see the underlying track is blacked out instead of actually showing it.

Got it! I see now what happens; I wonder if it would be helpful to see what each clip looks like separately, and to see how you are using the SPR filter (e.g., show it with and without the SPR filter enabled). I am thinking the SPR filter is changing the position of what should be chroma keyed, and that is why it makes a difference whether it is before or after the chroma filter - but that’s just a guess at this point!

I doubt it is a bug. It depends on the Operation parameter in the chroma key advanced filter, the track’s blending mode, and also whatever filter you put into the track (see icon on the track header).