ESP32 issue with Ubiquiti access points

[ilikeesp]

I need you help with the issue:
I created some code with this IDF:
xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz
When I connected my ESP32 board to mobile phone as access point I see 140kB of free RAM,
but when I connect the same ESP32 board to Ubiquiti access point I see 95kB of free RAM.
When I connect back to mobile phone access point I see again 140kB of free RAM.
How can I use different access points and still have 140kB of free RAM.
Is it some settings which I can change in menuconfig ?
For example WiFi buffer configs of some other settings ?

Thanks in advance