Yes, this amount of foam is quite common. Foam comes from detergent residues in your suit and your skin and hair. There are products to temporarily dissipate the foam, called foam down or foam eliminator. They are available at any hot tub store.
I usually recommend that you rinse your swim suits in the sink between putting them in the washer and dryer to get all of the detergent out. Some people go as far as to rinse off before getting in the hot tub. Too much work, imo.