FS#3950 - Switch is not working on Asus RT-AC65P with latest snapshot

[openwrt-bot]

Technocrat:

Supply the following if possible:

• Device problem occurs on: Asus RT-AC65P
• Software versions of OpenWrt/LEDE release, packages, etc.: OpenWrt SNAPSHOT r17216-8c2509dc5f
• Steps to reproduce:
  Install the snapshot as a fresh install or as a sysupgrade.
  Connect a PC to any LAN port except the 1st one.
  Try pinging the router or any device in the same network.
  Getting error: PING: transmit failed. General failure.
  At the same time the 1st port of LAN is working properly. WAN is also working.

Reverting back to an old snapshot fixes the issue. I have only one from July 2020 so I can't say when the issue appeared.