gstreamer-sharp 1.14.4 cannot seek

Hello
There is a bug in the gstreamer-sharp version 1.14.4.

When running BasicTutorial4.cs I get the error:
GStreamer-CRITICAL **: gst_query_set_seeking: assertion 'gst_query_is_writable (query)' failed when seeking
https://github.com/GStreamer/gstreamer-sharp/blob/master/samples/BasicTutorial4.cs#L115

The sample works with gstreamer-sharp version 1.14.0.

The difference between versions is in the MiniObject.cs. When I remove all the code dealing with Ref, Unref and finalizing and recompile it seems to work OK.

It looks similar to this: https://bugzilla.gnome.org/show_bug.cgi?id=746329

Thanks, and Merry Christmas and happy New Year