I'm interested in knowing more about IGN-15155: Deadlock in Modbus Driver
We've got an 8.3 install that is talking to a lot of Modicons, and one of them randomly decides to stop talking. Rebooting the PLC fixes the issue for a random amount of time. I'm wondering if it's in any way related to this fix that's coming in 8.3.4. Would help from having to spend time replacing a working PLC to fix a problem that isn't the PLC.