ADDITIONAL SYSTEM INFORMATION :
Windows 10.

OpenJDK 15.0.1

A DESCRIPTION OF THE PROBLEM :
I have a JavaFx Based Application which is working fine with jdk 1.8 till now. Now I am moving application on OpenJFX.

With OpenJFX 15.0.1 and on Windows 10

Playing Media File by setting startTime and stopTime stop rendering video frames on Player. Complete Black Screen is coming.

I can provide the Test Application,

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Load a media File with different startTime.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Video should play smoothly.
ACTUAL -
Black Frame is coming.

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Can provide a netbeans based testApplication.
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FREQUENCY : always