hlssink2: first segment after re-start longer than target duration

Here is a short reproducer below. The dis_00000.ts segment after pipeline restart is always significantly longer than 3 seconds specified in pipeline.

#include <glib.h>
#include <gst/gst.h>
#include <unistd.h>
int main (int argc, char *argv[])
{
  GstElement *pipeline;

  gst_init (&argc, &argv);
  pipeline = gst_parse_launch ("videotestsrc is-live=true ! "
      "video/x-raw,width=640,height=480 ! clockoverlay ! "
      "x264enc bitrate=3000 tune=zerolatency key-int-max=75 ! "
      "video/x-h264,profile=constrained-baseline,level=(string)5.1 ! "
      "hlssink2 name=hls playlist-location=/var/video/p.m3u8 target-duration=3 playlist-length=0 location=/var/video/s%05d.ts",
      NULL);

  gst_element_set_state (pipeline, GST_STATE_PLAYING);
  g_print("Pipeline started\n");
  sleep(10);

  gst_element_set_state (pipeline, GST_STATE_READY);
  GstElement *hls = gst_bin_get_by_name ( GST_BIN (pipeline), "hls");
  gst_element_set_state (hls, GST_STATE_NULL);
  g_print("Set pipeline to READY and hlssink to NULL\n");

  sleep(5);
  g_object_set(hls, "location", "/var/video/dis_%05d.ts", NULL);
  g_print("Set hls location to have dis_ prefix\n");
  gst_element_set_state (pipeline, GST_STATE_PLAYING);
  g_print("Set pipeline to PLAYING\n");
  sleep(20);
}

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Makefile

OBJS=pipeline.o
PKG_CONFIG=libsoup-2.4 json-glib-1.0 glib-2.0 gstreamer-1.0 gstreamer-webrtc-1.0 gstreamer-sdp-1.0
CFLAGS=-I include `pkg-config --cflags $(PKG_CONFIG)`
LDFLAGS=`pkg-config --libs $(PKG_CONFIG)`

pipeline: $(OBJS)
	$(CC) -o $@ $(OBJS) $(LDFLAGS)

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