Corrupt frames when negotiating memory:DMABuf with gl pipelines

Platform: Ubuntu 19.04 x86_64 on Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz

When negotiating for memory:DMABuf with Intel VA-API I get pure green frames or corrupt frames like here

No warnings or errors.

gst-launch-1.0 videotestsrc ! "video/x-raw,width=400,height=300,framerate=30/1,format=I420" ! videoconvert ! x264enc ! "video/x-h264" ! vaapih264dec ! "video/x-raw(memory:DMABuf),format=I420" !  glupload ! glcolorconvert ! glimagesinkelement