IP issue on AP

Hi,

I have a problem using multiple IP’s from the same range on one interface.

I have a RB Metal 5SHPn setup as an AP, with only two clients connecting to it. I’m running two IP ranges on the WLAN:

10.201.11.0/24 and 10.201.18.0/24

I have two grooves connected as stations to the AP. If I add multiple addresses from the same range to the WLAN I am only able to ping one.

Example:

I add both 10.201.18.55/24 and 10.201.18.72/24 to one station’s WLAN. When I log into the AP I am only able to ping one of the addresses. If I disable either one, then I can ping the other. I can ping the gateway from the station, and if I IP Scan from the AP it finds all the addresses on the range, however I am still only able to use one IP from a specific range per a device.

Any ideas as to why this would be are much appreciated.

TL;DR

Can’t ping multiple IP’s from the same range on a single interface. It’s like the other addresses become ‘invisible’