I reboot when this happens, but it always comes back eventually.
Mine does the same, I'm using a Sony Android TV. Also have an issue with Apps I've already installed disappearing but still showing installed. The fix I found was doing a complete reset, but the issue did comeback within a few weeks so not really a perm fix.
Try clearing leanback's cache
Yeah I get the same thing on a nexus player that I just upgraded to Oreo. Wasn't sure how to fix it. I assumed it was a bug and will be corrected on the next update. Now I know that it wasn't just me.
!Remindme 18:00
Is your TV running AndroidTV or is it something else?
Have you tried a factory reset?
Are you willing to use another launcher, like HALauncher?
Easy, get rid of the Featured Apps row by going into settings -> apps and disabling notifications for Sony Shelf and Sony Select. Those are useless any way, not needed. Plus, your home screen will feel snappier without those running.