Suspect nvh264dec leaks memory

Im working on an application that creates and delete pipelines several times. I noticed that when using nvh264dec it seems that it leaks memory.

As I'm not at all fluent in python, c, c++ or similar so I can only provide a Windows C# application that shows the problem. Application is really simple. A winform with four buttons for creating, starting, stopping and deleting the pipeline. A combobox lets the user select one pipeline with nvh262dec or one with openh264dec. By repetedly creating starting, stopping and deleting the pipeline one can see that memory usage increases using nvh264dec but not with openh264dec. I'm using gstreamer from git master downloaded 2019-11-28.

Could this be the same type of problem as in !898?

Disclaimer: I'm using gstreamer-sharp. This could affect this, even if it seems unlikely. GstreamerMiniTestApp.zip