We might want to explore this further. I captured a Debug log that shows the error occurring with XMDS doing a SubmitLog function. Here's an example:
646 1ddf41f 2017-03-01 11:28:25 XMDS ERROR SubmitLog POST SQLSTATE: String data, right truncated: 1406 Data too long for column 'page' at row 1 0 6
If you'd like me to send you the Debug log file, please let me know the best way to do that.
All I did for now was completely disable logging on the clients, hoping that the other threads around this would produce a defect that would get fixed in 1.8's final release. But as always, I'm happy to help however I can. Please let me know.