same behavior on 5.10.110-8-rockchip #f9d1b1529 from https://github.com/radxa-build/rock-pi-4a/releases rock-pi-4a_ubuntu_jammy_cli_b15.img.xz
Connect SRD-05VDC to GPIO4_D2/GRD/5V. Led on board is blinking. Relay itself working properly on 0/1.
5.10.63
5.10.110-8-rockchip / 6.1.50