It think that it's an insignificant mistake that nevertheless correlated with the user being somebody who probably doesn't look very hard at MTF graphs.

I don't shoot Fuji, but I have friends that do and I wouldn't use a phone for processing the results (for software reasons, the best raw converters for x-trans sensors are Capture One and Iridient, neither of which exists for iOS - it would be nice to be able to run a good converter on an iPad pro).