System becomes laggy over time: cursor and compositor slowdowns without high CPU/memory usage

[FruitPnchSamuraiG]

After using the system for a while, sometimes an hour, everything slowly starts feeling laggy. The mouse cursor movement becomes less smooth, window tiling and transitions start to stutter, and even simple UI actions feel delayed. It’s not a hard freeze or a crash, just a gradual degradation of responsiveness. Everything works but its just super laggy.

What’s confusing is that when I open the task monitor (Super + T) or check system stats, neither CPU nor memory usage seems particularly high. Nothing stands out as a clear culprit. It doesn’t look like a process suddenly spikes or a runaway service; it’s just that the whole session becomes sluggish.

Once I reboot, everything goes back to normal. Then after some time of regular use (mostly browser work, terminal, and switching tiles), the same lag starts creeping in again.