Cascadia w/ DD15 blowing white smoke on highway

Hey all,
You guys might have seen me around the south east this week blowing white smoke from my weed burner exhaust. Yes I get concerned citizens trying to pull me over. Yes at first I thought my truck was on fire. It seems to happen infrequently after city driving so I suspect the 7th injector and module of overfueling? I does not white smoke while running a parked regen.

I do have access to DDDL is there any test I can run to confirm my suspicions?