When I try to play a Rumble video with mpv, it always picks the lowest quality (320x180) resolution. Is there a way to fix that?

I tried adding this to my mpv.conf but it didn't help at all:
ytdl-format=bestvideo[height<=?2160]+bestaudio/best


It seems that the issue is yt-dlp and it just doesn't pick the "bestvideo" resolution for Rumble and just defaults to lowest quality 180p.
Can someone please tell me what's wrong?