h264 refresh issue

[Hollymingyi]

dear author,
I found when i join the livekit meeting room use android cell phone, and publish h264 stream via webrtc track writertp function , the video screen was blank. but if i shake the phone or switch the camera then the video screen was displayed immediately .
so i tried to invoke the replaceTrack function at the first ,and it doesn't work, could you give me some advice?