I had issue with 2.3.2.5 about year ago. Drop comm and freeze ECAT. Did not recall actual full reboot, but lost ecat master several times, freeze cmd commands and do some other weird things. Switch in to 2.5.1.7 a year ago . No single issue since. use 4.3.x.x IDE.
2.5.1.7 improve CPU loads a lot. Now process run lot more efficient and have better execution time. I know they have newer versions as well. But 2.5.1.7 work well for me, did not have time debug latest versions.
Also one note: in initial development back in 2007 had our system software issue with proper handshake ack command.( was wrong ack TCP/IP command from turbo version). That wrong acknowledgment command some times force reset controller( once in 20 min or so). Not recall what firmware we used back at that time. But may collect wireshark and confirm no unusual data before each reboot.
