Mac Keyboard Mapping - Again

It's hard for me to believe that there aren't more questions/complaints about this issue.  It happens to me EVERY TIME to both PC and Mac remote clients when I remote control them from either PC or Mac (I primarily control from macOS).  At first, things seem to work fine, but then suddenly, keys typed are accompanied by a modifier, like CNTRL, SHIFT CMD, etc.  My only recourse is to type and copy what I need on my side and paste into the remote side. Sometimes, it'll begin to work properly again in the given session (and will then break again, too).

The only thing I "thought" seemed to have an affect was if I was tabbing to the next field I want to type in vs. clicking the mouse in the next field.  Clicking the mouse for the next field "seems" to bring the problem on, but not consistently; just more often than not.

As I say, this happens at some point in the session, every single time; and has done for years.  This happens in GoToAssits Expert AND LogMeIn Central/LogMeIn Desktop Client.  It does not happen in Splashtop, in my experience with that product.  It's just very hard for me to believe that anyone would have trouble reproducing this problem.  It happens with all of my techs across all (hundreds) of our clients.

Some real attention to this and a fix would be great.  It's VERY annoying to have to resort to copying and pasting to effectively "type" on the remote side.

Thanks.