I use ISP service who is known to artificially limit network traffic. I noticed this as I have trouble during connection initiation to Tor when I use Whonix in virtual machines and I don’t have the same issue if I use another network provider. When I try to connect to a website on Workstation I open wireshark on the host system and observe many ICMP packets with notice “Destination Unreachable(fragmentation needed)” sent from nodes inside ISP’s network. Sometimes I can connect succesfully to websites, most of the times I can’t.
But if I use tor browser on my host machine to connect to the very same sites I have no problem at all. Connection is successful 100% of times and I see only a few destination unreachable packets.
I guess I have a problem with particular obfs4 bridges on whonix? Once I couldn’t use whonix at all because it didn’t find bridges in torrc available for use even in networks with no latency issues. I spontaneously fixed it with reconfiguring tor connection settings and choosing obfs4 transport once again in tor settings. Old bridges were replaced with new ones.