What setting am I missing? Wifi poor response from ping to wired LAN.

I'm using a Draytek Vigor 2862ac as an office router.

LAN1 is 192.168.22.254/24

WiFi Alarm is 192.168.22.10 DHCP

My phone is 192.168.22.11 DHC

My laptop is 192.168.22.12 DHCP

DNS primary 192.168.22.254 secondary 1.1.1.1 Gateway 192.168.22.254

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Office printer is static at 192.168.22.200

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Any of the wired LAN devices can ping and use the printer but none of the wireless devices can.

Using a network scanner like Fing I can see all the wireless devices but intermittantly see some wired devices like the server and occasionally workstations, never the printer.

Can anyone tell me if this is something I've missed?