ADDITIONAL SYSTEM INFORMATION :
Linux / Mageia 7 / JDK 10.0.2

A DESCRIPTION OF THE PROBLEM :
The ban on changing the window size does not change the size programmatically.

REGRESSION : Last worked in version 8u181

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create a new template of JavaFX application.
Apply the setResizable(false) method to Stage.
Run.

Warning: the problem may occur after several (3-5) startup attempts.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
A window size of approximately 200x100.
ACTUAL -
A window size of approximately 1x20.

---------- BEGIN SOURCE ----------
https://gist.github.com/MrChebik/20cf78672e4c25f4ac1ef22867a8a037
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Do not use setResizable.
Instead, use:
* setMinWidth & setMaxWidth
* setMinHeight & setMaxHeight.

FREQUENCY : always