Apple Watch not registering activity

I set my exercise goal to 30 minutes. My workout on 4/1/20 reflects 30 minutes; however, my exercise ring only reflects 2 minutes. This has been an ongoing issue that I began noticing in March. On 4/2/20, I did the treadmill for 32 minutes and the activity ring reflected it correctly and it reflected the same listed in exercise minutes. I later completed a 50 minute walk and the total minutes of exercise only increased by two minutes.