If you’re using wi-fi to connect your streaming device, try restarting your router, easily done by unplugging power source for 30 seconds, as also your Roku or Fire stick has a reset button in settings. I do both regularly and have very few problems
Download the fast task killer (https://www.techdoctoruk.com/fast-ta...android-tv/)on your firestick, frees up ram. I haven't had a problem on either my Firestick, Roku, or Chromecast this week, save the Roku interface being sluggish.