Route 6 Bug

I have found that the rematchable trainer on Route 6 (Lass Wilma) sometimes disappears from the map, thus preventing rematching. (This isn't just exclusive to my game either. There is an instance in MunchingOrange's LP where he actually MISSES that very trainer due to this glitch.)

Here's a picture of her absent from the route:



And for reference, here's a picture of her actually there:

Yes! Last night saw the same... Route 05 and route 06 are possesed! Just like the camper girl in the top of the mountain next to the beach, she also appears and disappears 'randomly'.