This patch fixed that problematic Dune file in Player-LED/LLDV while in auto cd/cs for me! Applied after updating to the 20240319 nightly.
MediaInfo: Imgur: The magic of the Internet
dispinfo during playback: https://paste.coreelec.org/HEcUWE
dmesg: https://pastebin.com/raw/Nx48UCLC
Start of playback was also much faster, no delay and I could see the opening caption text before the WB logo.