Can't add .m4a to timeline, renaming to .mp4 works

Sometimes I receive an audio file in .m4a format as one of the files for a project. When I try to drag and drop it into a Resolve bin, it doesn't show up in the bin. In the past, I've just converted it to a .wav which then works fine.

On a whim, today I changed the .m4a extension to .mp4, and was then able to drag and drop it into my bin (as you'd expect). Then I added it to my timeline and it appeared as an audio-only clip (the same way I'd expect a .m4a file to behave). So problem solved with a simple file extension change vs an external format conversion.

Is there a setting I can change so that .m4a files aren't rejected outright when Resolve can actually use them? If not, this might be something the developers could look into - it seems like a straightforward way to increase the number of formats Resolve supports without writing much new code.

I'm using 17.2.1 build 12 on Windows 10.

I've just converted it to a .wav which then works fine.

My choice would be to continue on that path.