RBR50 post v.2.2.1.210 update my logging has change behavior in a negative way.

Your experience is similar to several users.  Orbi's management of log files appears to be "broken" in a number of ways, including what events are put into the log file, when logs are sent, and when the log file is cleared.  Some people report that when they "reset to factory", the behavior becomes normal again.  (I, personally, find the effort to reset and input all my configuration more trouble than getting a good log file is worth, so I have not tried this myself.)

It is probably worth pointing out that the vast majority of Orbi owners have probably NEVER looked at the log file, and certainly have NOT set the Orbi to email log files to them.  We are a tiny minority.  Of course, this is not an excuse for poor programming.