Broadway Limited Imports Paragon 3 Big Boy Trouble URGENT

Recently, My BLI Big Boy has been randomly stopping on the tracks, but the sound still works and also the headlights starts to blink, I keep on encountering this issue and I don't know what to do. I cleaned the tracks on my layout but it wasn't the tracks, when I run the train forward, it will randomly come to a halt, if I run it backwards, it will continue operating for longer amounts of time. I ran the locomotive today and it stopped not even making it all the way back around the track to me. (Idk if this has to do with the cause but) before it would randomly stop like this, I accidentally added an extra drop of smoke fluid down the stack. Would the smoke fluid be able to reach the electronics? And if you have experienced something like this in the past pls answer, I love this engine and I don't want to have it just randomly stop on the tracks. Not do I want to run it backwards for the rest of it's career.