2014 diesel fuel filters
 

Got a s/hand 2014 grand cherokee limited diesel with about 100,000 km on it, love the car.
It had a oil change done at the dealers prior to pickup but noticed still had a dirty air filter and cabin filter which i changed.
Decided to check the fuel filters and was surprised the filters were black.
I noticed the date on the old wesfil filters were 2019 so not that old.
Is it normal that they get that dirty within 12 months ?
Replaced them with Mopar ones.