I am having a simliar issue, but jitter/ latency with a video game. i have huge lag spikes and it appears that without the vpn its not working.
---------VPN-------------------
Tracing route to 204.2.229.11 over a maximum of 30 hops
1 24 ms 25 ms 27 ms 10.14.239.210
2 40 ms 32 ms 37 ms 216.182.237.201
3 * * * Request timed out.
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 ^C
----No VPN-------------------
C:\Users\danie>tracert 204.2.229.11
Tracing route to 204.2.229.11 over a maximum of 30 hops
1 1 ms 1 ms 1 ms 192.168.86.1
2 14 ms 11 ms 9 ms 10.149.0.1
3 9 ms 10 ms 12 ms 68.6.14.60
4 15 ms 8 ms 11 ms 100.120.108.24
5 14 ms 12 ms 12 ms sdo-b1-link.ip.twelve99.net [62.115.48.24]
6 122 ms 118 ms 120 ms 204.2.229.11