Desktop sharing FPS not working

I am trying to test the desktop sharing on my jitsi-meet server. I have set the minimum and maximum frame rate in the config.js file to 30, but even in a chat with just two devices it insists on sharing at 3-15 FPS, even though there is enough bandwidth for more. It is using the native resolution of 3840 by 2160. It seems like the videobridge is being extremely aggressive about saving bandwidth (despite the gigabit connection) and is cutting it down.

Any ideas about how to fix this?

I ran into the same issue, and appended my info to this ticket:

I also have this problem with regular video. I can set whatever resolution and FPS parameters I want, but the videobridge or whatever will decide arbitrarily to switch to 15, its favorite number. It also really does npt want to upload more than 2.5 Mbps seemingly.