Some Galaxy S9+ photos have huge file size

[TangSooTony]

Some pictures have a truly huge file size. Sometimes over 100MB. I took 2 pics this morning, almost identical, less than a minute apart, with the exact same camera settings and resolution (7.9MP 4032x1960). One pic is 3.5MB, the other is 107MB. I looked in the file details, and the only difference (aside from the size) is that larger pic had a 1/107 exposure time, while the other had a 1/109 exposure. See pics in link below for comparison. I've run into similar situations, with some pics having a normal file size, and others from the same session coming in at 40MB. Anyone have a clue as to why? Thanks.

https://drive.google.com/open?id=1hPYtwea0aCCIm6R93UYMLR7DoiMVJSJ9

 

[lucianus_luciferus]

It looks like the larger file is corrupted as I can't open it.

 

[Rukbat]

There doesn't appear to be any difference between the two files, not even in the EXIF data or the canvas size. (I was able to download both of them.)

I'm at a loss.