Choosing preset when exporting doesn't work

Hi!

I'm trying to change preset when I'm exporting to "Match source - adaptive high bitrate", so far so good. But as soon as I'm trying to change anything else, like the bitrate settings or checking the box of "Use maximum render quality", the preset automaticly changes back to "custom". Why is this, and what can I do? 

I've just updated my Macbook pro, macos 10.15.7. 

Thanks!