Slow wifi after sleep

I'm running a vanilla install using clover. I try to build with components that are supported OOB. I've had few problems and usually everything is very smooth. Lately (on 10.14.4) I've identfied that my wifi speed is very low after the computer is woken up from sleep. Slow for me is usually 0-2mbps while normal is 60mbps.

​

1. My other devices has normal speeds from the same distance as my hack
2. My hack has normal speed once restarted, it's only slow after sleep
3. Using usb-tether/ethernet gives normal speed all the time
4. The transfer rate in the wifi-menu indicates a tx rate that should give me a normal performance (when it is slow)

​

I'm using fenvi t-919 that is identified as "AirPort Extreme". Apple watch unlock, airdrop, continuity all works no matter speed.

Any tips on how to solve this?