Why is roku falling?

Hey, I own 13 @ 258.85 as it started falling this month and got to an rsi of 30. This is a stock I used to swing trade on late last year/earlier this year because I truly believe that it’s a strong company that has a volatile stock. I deemed the price attractive so I bought in - and then immediately after that an analyst downgraded it from 330$ to 220$ and now it’s trading at around 228$. I really dont see anything to warrant this downgrade especially after the earnings they had - their expected eps was 0.06 and it was actually 0.48. Their revenue was off by 0.13%, but I don’t see why it would tank like this and keep going down cos of that. Any other ideas? Thanks!