I thought I spotted this as well with mine on the last trip. Left with x miles and got home with less than x.
I wrote it off as needing a new pair of glasses.
It just reminds me of some things I went through in the 60's... if I could remember the 60's
You're thinking of a different sort of trip...
But seriously, as the trip is effectively the fuel gauge, is there a reset for this problem or do we need a replacement?