Cars3 Blu-ray with HDR played in an LG 4 k player worked great until I updated the Blue Ray players firmware. After the update, when the disk is played it turns HDR on the LG C7 OLED display hdmi port. Once I click ok,,, the picture goes to no signal. It worked fine before the firmware upgrade to the player. How do I go back to the previous firmware revision? Btw other blue rays with HDR seems to play ok. Not sure what the deal is with the cars3 video.