AirVPN speed dropped to 1/3

[pfolk 6]

noticed that in the last (2) weeks the AirVPN download speed dropped to 1/3.
We're on a Gigabit connection, w/ Wireguard we were getting for the last (2) years 60-70MB/s, now it dropped to <= 25MB/s.
tested on (2) machines, both running Win 10 x64 and AirVPN 2.24.6.
Also uninstalled and re-installed AirVPN.
nothing has changed on the machines or AirVPN cfg.
tested w/ high speed downloads.
Servers used are close in proximity w/ very low ping.
when switching servers trying to find a faster one, sometimes you can get one that (although higher ping) provides the usual speed 60-70 MB/s.

How to fix this?
What is throttling the connection?

Thx

[pfolk 6]

anybody?