Instagram Stories

Hello, I have a problem with Instagram Stories, the number of those who see my stories suddenly stops sometimes, for example: 10 minutes after I posted a story I see 40 people, and 2 hours after I posted it I see 41 people, another example would be: one day the stories are seen by 500 people, and the next day I see other stories with only 50 followers. P.S: My followers have been decreasing for a while (about 15 a day).
P.S: I have 8,000 followers
How do I solve it?