My child has been acting out at daycare: Advice?

So I have been having an issue with my five-year-old; he’ll be 6 in October and is starting Kindergarten in a couple of months; he’s been going to daycare since he was 18 months old and has never had any issues whatsoever … lately, he’s been having major behavior issues at daycare to the point I have to pick him up early AT LEAST once a week, sometimes more, he has lost all of his electronics and toys, I don’t know what else to do or why this is so sudden and sporadic help!