train sound 6-36788

I think this issue may have been brought up before but here goes; i’ve built the railsound box car kit, the trainsound tender kit all work well as they should. i’ve just purchased the lionel train sound tender 6-36788 it sounds great but does sound the whistle often randomly. the rollers have some wear nothing extensive the track is clean and there are some lighted cars on track with this. I think i’ve covered all the basis and suspect the main board is loosing its marbles. any suggestions greatly appreciated.