I have had this kind of hives. When young bees come out to make cleansing flight at afternoon, some cannot fly. If other hives are totally normal, the reason of disabled bees may be in genes. So it is better change the queen.
Once I had a hive, where about 20% of bees cannot fly. So hive cannot collect honey because it's waste is too great. During that time I have in my stock many this kind of cases. Now I have got rid of it, almost.