Video restriction caps were not properly set by `ges-launch-1.0`

Using Gstreamer 1.16.1

ges-launch-1.0 apparently does not set the video restriction caps properly.

export GST_DEBUG_DUMP_DOT_DIR=c:/Users/ding/Desktop/bt470_repro/dot
ges-launch-1.0 --video-caps video/x-raw,colorimetry=bt709 +clip bt470bg.jpg duration=5 +clip graph.png duration=10 -o output.ogx

When the pipeline plays, the graph shows a GstCapsFilter with a value of ANY.

The *.dot file is attached 0.00.01.704950000-ges-launch.PAUSED_PLAYING.dot.

Notice that the colors for the first 5 seconds of output video are off. I was able to generate output video that looked correct while using custom C++ code that wraps GES, where the video restriction caps were defined as:

videoTrackRestrictionCaps = gst_caps_new_simple("video/x-raw",
    "framerate", GST_TYPE_FRACTION, (int32_t)frac.m_numerator, (int32_t)frac.m_denominator,
    "colorimetry", G_TYPE_STRING, "bt709",
    nullptr);

These are my input images.