I reported this in the first alphas.
I have the same in every version. After few hours I need to restart Plyxon, because it uses a lot of resources.
This even happens on Plyxon, which just connected to the database and did nothing for several hours.
I recommend one a day "killall -9 plyxon"

My system: Ubuntu 23.10, GNOME 45.2, X11. NVIDIA with drivers version: 535.171.04.