ROCK 4C+ performance (WIFI and USB)

All,
I have setup a ROCK 4C+ running on Debian 11 Desktop(Linux 4.4).
I am seeing 2 problems
1- WIFI and globally network seems to be slow. When I type in the terminal, there is a delay of couple of seconds. I don’t get the same issue on same network with PI 3 and PI4.
2- USB is dropping. I can’t find out if this is power usage.

Antoine