[Lazarus] Lazarus and Lazarus Apps unreliable over Teamviewer

[Joe]

Remote client is Teamviewer 13.2.3629 under Win 10 (64), Remote Server 
is Teamviewer 13.1.1548H under Raspbian Stretch on a Pi 3B+. Both 
machine is set to Keyboard Layot German.

 From the windows machine, I start Lazarus 1.8.4 (FPC 3.0.4, SVN-Rev 
58021) on the Pi and open the code editor.
Then I try to type AltGr+.. combination characters like Vertical bar, 
Euro-Sign, At-Sign, Backslash, braces and brackets. Sometimes the typed 
chars appear in the code editor window, sometimes they don't. Often (not 
always) it seems to depend how quick I release the AltGr key.

The same unreliable input behaviour I see with Lazarus generated 
executables containing SynEdit components, when I try to type into them.

Similar problem: See thread "Lazarus still not usable with VNC under 
Raspbian" and issue 0030544 in the lazarus bugtracker.

--  Joe