Episodes Missing from Progress for Junkyard Wars
For example, Junkyard Wars Seson 11 doesn't show up in my progress page, but it is there in the detail page.
It sounds like you have that season hidden from your progress. You can restore it at https://trakt.tv/settings/hidden.
Joshua Vallender commented
S12 only E9-12 show but all are in the season page for example. nothing on the hidden page for this show.