Hey All I am having similar problems on a mac after the recent update last night, 5.1.2020.
I was running fine and wonderful with pings at 10-12ms and now if I am in a session with a pc user, it seems I receive no audio and just the packet loss error. I have tried to update all my router and sound card settings but nothing works.
This is so frustrating the app was working great a week ago! What can we do?!
No audio here since the 5/1 update.
MAC 10.14.6 w/ UA Apollo Twin DUO
Looks like this has has been rectified for me. I did remove my WiFi from my network. Go into system preferences, network, select WiFi and then the minus sign. (You can add back if ever needed) I never use WiFi on my Mac as it’s hooked up via Ethernet but the WiFi present was giving me dual IP addresses in my terminal. This got rid of the dual IP in terminal and now I’m not getting packet errors since last night. Give it a try....
I'm having similar problems, wherein the packet loss errors are creating audio dropouts in the feed from the other session players.
The specifics:
Build 1.20 - 1.0.3672
OSX 10.14.1
Focusrite Clarett 8Pre (exact same problem with Focusrite Scarlett 2i2 3rd gen)
Direct wired connection to my modem
If you're suffering packet loss issues the only things you can try your end would be the following :-
1) Go into your router's advanced settings and see if you have a QoS (Quality of Service) option and if it is enabled. If so turn it off as this can cause apps such as Jamkazam to have more issues.
2) Set up a port forward to your computer's IP (you can use the default 12000 and maybe do a UDP range between 12000 and 12020) and then in the application preferences tick both options to start Jamkazam when system starts and Always use the same set of UDP ports
Aside from that ensure no one else is on your network and disable any other apps that might be polling your internet. If after that you're still having the same issues then I think you might be out of luck as that would be down to either your internet connection (if you're with an ISP that has a high contention ratio and there are lots of people using the internet as they're watching endless Netflix or working from home you're more likely to suffer packet losses) or the quality of the internet connection of the people you're connecting with, at least this is the case with the experiences I've had daily over the last few weeks.
stevant's comment at 05-03-2020, 12:18 PM was the winner for me: Fully removing wifi from Internet options. It fixed my issues last night as well as those of all of the people I played with today, who were all on Macs.