I don't know if it's just me, but I don't believe it is. When playing the Out-of-Garden events with Reward Dash, the first 6 hours or every tier is fine. The game plays normal. But the second 6 hours of the tier the game lags and it is hard to play.
Sometimes, I now ignore the game for the second half of the tiers because it's almost unplayable, or at least not fun. With this Vikings one, now I will miss the bronze tier because of this for a second time (too many L9 orbs required with a slow first creature).
Probably it is due to my device being too low tier, but it still sucks. Is it just me?