Apparently HBO is showing the shifting AR version of Kong: Skull Island, much to the director’s chagrin:

Jordan Vogt-Roberts @VogtRoberts
Dear @HBO. Based on twitter, it seems you’re playing the AIRPLANE edit of Kong: Skull island that shifts aspect ratios. I begrudgingly made this version to preserve my original framing in certain sequences. Why are you playing this compromised instead of the original? Ugh…

Todd Vaziri @tvaziri
Confirmed.
https://video.twimg.com/tweet_video/DPtJvg2UEAAINBo.mp4

While it’s apparently not the director’s preference, it seems worth preserving. Just an FYI for those with the tools and interest.