[Ubuquiti ER-X] Hardware flow offloading for Wifi?

Hi,

I known the option "Hardware flow offloading" is an experimental option.
If I active it, the trafic on/from LAN to Web is OK. But, not for my zone "Wifi" (where smartphones/tablets or laptops can be connected to the web) : the devices can not connect on web.
When I disable this option, everything works fine.

Am I missing one rule for the zone Wifi?

Here are my zones:
Zones

Here are my trafic rules for the zone Wifi:

Hi, with v 19.07.4, it seems run correctly!

Upgraded yesterday. Wait to analyse those in few days/weeks. :stuck_out_tongue: