How to reproduce:
1. start umbrello
2. add two classes and an association between both classes
3. select the association
5. press context menu -> properties
6. enter documentation
7. press okay

What happens:
The documentation window does not show the documentation entered in the property dialog. 

What is expected:
The documentation window should show the updated content


Additional informations: 
The documentation window shows the content which has has been entered by the documentation window before changing through the property dialog, which indicates that the documentation changed by the property dialog is overwritten
by the content of the documentation window.

A workaround is to change the documentation of an association *only* through the documentation window.

Git commit a2578d04a3661a51c9fc3a752b02dfa30fce0665 by Ralf Habacker.
Committed on 18/06/2017 at 11:01.
Pushed by habacker into branch 'Applications/17.04'.

Fix 'Association documentation not shown in Documentation panel'.

Keep overwrite related handling for association widgets in sync
with other DocWindow::showDocumentation() methods.

In case overwrite is true the content of the documentation widget
should be overwritten and not saved in widget.
FIXED-IN:2.22.3 (KDE Applications 17.04.3)

M  +1    -4    umbrello/docwindow.cpp

https://commits.kde.org/umbrello/a2578d04a3661a51c9fc3a752b02dfa30fce0665