pretty sure - same thing happened on mine, it would randomly die - didn't matter if i was stopped at a stop light or driving 65 down the interstate. Sometimes kicked right back on, other times took 5-10 minutes to start again.
easy way to find out - if the rpm gauge IMMEDIATELY and very quickly drops to zero when it quits while driving, that's a pretty dead giveaway.
Trust me...it will get worse. It's like a $50 part, just change it
1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 283,000 mi and runnin' strong