Plotting Slickshot Show-off in standard ranked causes the haste electricity sound effect to play for the entirety of the game, including when Slickshot Show-off is in the graveyard, returned to hand, or exiled. This does not happen with other cards that have haste before slickshot show-off is played. Those only last that turn as a short zap sound effect when played.

Platform: iPad via App Store
Steps to recreate:
1) Enter standard ranked.
2a) Play any other card with haste. Attack or don’t attack, doesn’t matter. Wait a turn and any haste electricity sound will have gone away. It’s typically just a short buzz anyway. This step is optional.
2b) Plot Slickshot Show-off and play it whenever. The noise starts when mana is spent to plot the card. The sound seems to be tied to the plot “fireball” animation (idk how to describe it), but also sounds like the haste sound effect.
3) Play the rest of the game as normal. The haste electricity sound effect will not stop.

Working on uploading a video here, but it’s like 2 minutes long when sped up. Might make an Imgur album and link here. I haven’t tried other game modes or deck types with it. As far as I know, it’s only in standard ranked regardless of what deck I personally use (red/blue or red/black etc.). I haven’t encountered it when other players play it, just on my end when I plot it.

(This previously said plot and play from hand, but I couldn’t reproduce the play from hand bug. Must’ve been mistaken, but plot bug is reproducible)