Sprinkler sometimes doesn't completely work.

Sometimes when the sprinkler goes through it's watering cycle it doesn't water all the crops. I've noticed this before but recently some of my crops were even 2 stages behind instead of just one stage behind. Personally that was new for me but I've seen it happen to others.
This bug doesn't happen to me often, the section of my farm this happened in had gone through 41 harvests until this happened.
Would assume this is caused from me being out of range/not in my realm. But I'm rarely in range of my farm and 80%+ times it works just fine.
This bug has happened to me more often with the iron sprinkler then the wooden one, but that could also just be a coincidence.