So my daycare provider used her own sunscreen on LO (not what I provided)

Anyway she used Banana Boat Quik Blok Sunblock Spray Lotion, SPF 35
Each time the spray was applied, within 20 minutes DS was super cranky and really sleepy. She described it as 'passing out' in and out of sleep and just crying. Him skin was also had red spots/splotchy.
Obviously she isn't using the spray again but what in the world causes this type of reaction so that I can avoid it?!
Of course I will ask the Dr at the next appointment. Wondering if anyone here has any thoughts.
Re: sunscreen sensitivity?