​ LG WebOS TV Playback speed problem

Hello,
I’m developing software for tv with webOS operation system. The speed does not change in the playback speed operations in the file with the IPK extension. When I open the same page in the TV’s browser, it works fine. I need help with the problem.

Does your app use the playbackRate property of the video tag? The native player does not support this. Sorry for not being helpful.