Mortal Engines "wrong aspect ration"

[SporeTinte049]

Hello,
a I'm a newbie to makemkv. I bought a LG BU40N, flashed it successfully and put in Mortal Engines (UHD).
After ripping I opened MediaInfo and under Video there is:

Display aspect ratio : 16:9

instead of back cover 2.39:1

What I am doing wrong?!?
The full MediaInfo report is attached! (Sorry for my bad Englisch)

MediaInfo.txt

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[Grauhaar]

MediaInfo does not know the real aspect ratio of an movie. HD content is always in 16:9 (the base),the difference between 16:9 and the movie aspect radio is filled with black bars on top and button and/or left and right.

[SporeTinte049]

That means everything is alright?

[demon]

Yes. The display aspect ratio of all Blu-ray Disc content is 16:9. The content can be letterboxed to whatever aspect ratio, but 1920x1080 with square pels is always going to be 16:9.