ANSWERED pfSense install sometimes capped at 20mbit

[Panja 2]

I have a pretty decent pfSense box. i5-5250U with 8GB of ram.
I don't have any IDS, Snort etc running and CPU is idling at 2 - 5%

I have configured AirVPN with this tutorial:
https://nguvu.org/pfsense/pfsense-baseline-setup/

Everything seems to be working and most of the times I'm getting (almost) full speeds.
But a few times a day I notice lag and when I do some speed tests I'm maxing out at 20 mbit.
The speed of 20mbit is everytime I'm lagging out. I have tried dfferent servers of course and also different ports but same problem.
A few times a day it's capped on 20mbit.
Sometimes I do see some packetloss (1 or 2%) on the VPN gateways as well. But my regular WAN (ISP) does not have any loss.

Does anyone have a clue what this issue could be?

[Panja 2]

Yesterday evening I had this problem multiple times.
If I do a speedtest on my regular LAN the speed was at it's max.

[go558a83nk 352]

sounds like the route to the server your using gets relegated to limited bandwidth and non-priority at times.  your ISP at fault.

See if it happens when you use servers that use different routes.

[Panja 2]

I'm still testing but it seems to be a problem when using UDP.
When I'm connected to the same server(s) with TCP instead of UDP the problem does not seem to occur.

[go558a83nk 352]

that's more evidence that it's your ISP shaping bandwidth.

[Panja 2]

As I said I'm still testing but it seriously does look like it yes... 😮

I'll keep you posted in a few days. Thanks!

[Panja 2]

After using a TCP connection to AirVPN instead of UDP I can say I never experienced the 20mbit problem I described above.
So it seems my ISP is doing some voodoo shit here...