ADDITIONAL SYSTEM INFORMATION :
macOS Mojave 10.14.5 (18F132)

A DESCRIPTION OF THE PROBLEM :
Using a 3rd party well mature java application and observing erratic behaviour on context menu
a) demonstration : https://youtu.be/sNxHQw-Se-w
b) reported on the client application as well https://sourceforge.net/p/freeplane/bugs/2577/

REGRESSION : Last worked in version 8u211

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
open client application, right click and context menu disapear

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
right click context menu normal behaviour
ACTUAL -
right click context menu disapear: https://youtu.be/sNxHQw-Se-w

FREQUENCY : always