Linksys WRT1900AC v2 Slow Upload speed on 22.03.0 stable

Installing and Using OpenWrt
1

Continuing the discussion from Linksys WRT1900AC v2 Slow Upload speed on 22.03.0 stable:

Has anyone seen this affect download speeds of LAN connected devices as well? Also, I'm wondering why the suggested script (see below) is enabling and then disabling flow control on the LAN ports on which 10/100 devices are connected. Shouldn't a disable be sufficient? Final question is where should this script be added on the router?

#!/bin/sh

if [ "${ACTION}" = "ifup" ]; then
	if [ "${INTERFACE}" = "lan" ]; then
		logger -t hotplug "Enabling disabling FLOW Control"
		ethtool -A lan2 autoneg on rx on tx on
		ethtool -A lan3 autoneg on rx on tx on
		ethtool -A lan2 autoneg off rx off tx off
		ethtool -A lan3 autoneg off rx off tx off
	fi
fi
2

Final question is where should this script be added on the router?

/etc/hotplug.d/iface/

3

Kernel 5.15 don't have this issue...