Yes and no, Multigun. While the behavior does not appear to happen on unmodded servers, the list of loaded mods across servers and on our test server show mutually exclusive lists with the possible exception of Pippi which should do nothing with regard to building.
I agree the behavior is mod triggered but I suspect it is something underlying in the game or devkit rather than something specific a modder did. Seeking solutions not casting blame, but I suspect it ties to the recent undermesh prevention work.
For example, on my server I removed all mods and behavior cleared (great!). I then began adding mods back one by one and testing. I began with Pippi, no issue. I got to SVS and the behavior returned (bad).
Next I reached out to Senja, author of SVS and we got on her test server, loaded game.db and ServerSettings.ini from my server with only Pippi. No issue. We loaded SVS…no issue. We loaded Riverboats mod, behavior appeared.
I then deleted every building and placeable on the test server leaving the mods in place. Began building with no issue. I then began loading every build piece and placeable from both Riverboats mod and SVS…the behavior never returned on the test server.
It is not Riverboat or SVS specific because Senja knows another server running Pippi, SVS and Riverboats with no issue. One of the posters above has issue with neither Riverboats or SVS loaded (though they have Pippi, who doesn’t?!)
I have provided an error log snippet that occurs exactly when the behavior happens. I am hoping Funcom can tell us what this means or implies.
In my testing the behavior happened when a player attempted to place a build piece in an invalid area (other landclaim or no build zone), that set the behavior in place for everyone across server in large swaths of the map until server restart.