I'll use Follow Me for this example however it does do this with Rage Powder as well. So When a Pokemon Uses Follow Me in a Double battle it functions as it's supposed to, so it Redirects all moves it's supposed to however if the Pokemon that used Follow Me dies during turn it used the move then the remaining moves left would still be redirected into the Pokemon that used Follow Me basically negating the remaining damage left as it has no health to be reduced. With this bug it doesn't happen when there's only two Pokemon left on the side of the user of the move, as when a Pokemon uses Follow Me with two Pokemon left (Both being on the field) and the user of Follow me dies, it works properly as the Pokemon gets removed from the field in that scenario so in that case it works fine.

Hi,

I can confirm this issue still exists in the latest 8.3.6 release, a pokemon which is the center of attention and faints (while at least one other pokemon is available to switch in) will still draw attention for the rest of the turn, effectively negating the damage. This issue will be moved to the internal tracker soon.

Forwarded to the internal tracker; thank you!

I can confirm this issue has been resolved in the latest 8.4.0 release - thanks for your report!