I'm current having connection issues on my HP GT5820 printer. It seems the SPI firewall is blocking the connection. When this option is enabled, the printer can be setup with no issues, but after a while (seems to happen when my laptop is turned off for a few hours), the printer will become grayed out and unusable, you need to reconfigure it again to make it available. When the SPI firewall is turned off, the printer still offline but can be reconnected by turning the laptop wifi off then on. This started when I upgraded to the latest firmware which is 1.0.14 Build 20211118 rel.43110(5553). I have found out that this also happen to AX11000 routers. I hope this will be fixed in the next firmware update,