OpenWRT v 1.12.3-1 High CPU usage

I just installed tailscale on OpenWRT using opkg.

Tailscale version: 1.12.3-1
Hardware: [OpenWrt Wiki] Techdata: GL.iNet GL-X750 (Spitz)

I dont know what version I used to run, but it was from around May 2021. The CPU usage used to be much lower and now its constantly over 90-95% and is slowing down the operation of the router.

Not sure if there is anything I’m able to do, but installing an older version?