Howdy! Well, no changes in the version you have, other than moving from release to hotfix 1. We don’t change already released code (without it getting a new hotfix number that is). BTW, why Corona 3 and not Corona 4?
So, unless you updated to Hotfix 1 recently and things changed, the changes must be due to non-Corona things, such as changes to C4D, the OS, the router, etc. Or it could be that recent projects are sending less data back and forth over the network and so are working fine, while previous projects with problems were larger and more complex?
I hope you were able to catch up with Marcin and Ben at D2, as they were the ones there this year
It is good news that it is working of course, and Corona 4 did have changes to the way TR works now that I know it is 4 rather than 3. There was a new “arbitrated mode” that aimed to reduce or remove TR problems, and searching on all network interfaces (see 3D Rendering Blog for ArchDesign, ArchViz, Media & Entertainment | Chaos and search for “Team Render”). So it could be that if you moved to 4 from 3 since last tests, which would be great news!