unstable wlan 785s

Hi there

I've got a problem with the wlan of my mobile hotspot.

My Computer and other devices loses the connection to the internet every few minutes.

After i disconnect and reconnect to the wlan, it works fine again.

The aircard is always in the same spot with a good lte connection( even an antenna is installed).

If I use my mobile as hotspot there are no problems.

Thanks for your help