I tried to look for related issues:
- VLAN config related: Lack of access to LAN ports in openwrt18
- Temperature related: https://electronics.stackexchange.com/questions/605812/lost-ethernet-connection-with-temperature
OpenWRT related code that involves the rt3050:
by searching https://github.com/openwrt/openwrt/search?q=rt3050
- https://github.com/openwrt/openwrt/blob/master/target/linux/ramips/dts/rt3050.dtsi
- https://github.com/openwrt/openwrt/blob/master/target/linux/ramips/image/rt305x.mk
- https://github.com/openwrt/openwrt/blob/master/target/linux/ramips/files/drivers/net/ethernet/ralink/soc_rt3050.c
But i don't know how to interpret this, as I am not a programmer.