Epmp 1000 hotspot crash

Hi

i have epmp 1000 hotspot and i use it in restaurant for local network.
Maximum 10-15 clients in ap (2 bank terminal, some mobile phone)
Wireless it crashes every day. I need reboot.
I also replaced the device with a new one but it dosen’t help.
I ping my router and minimum 2-3 % but rather more packet loss.(RF signal good)
When wireless crash i can’t connect and connected devices have no internet.
Can anybody help?
Thanks