What you are describing is one of the more frustrating bugs.
Only slightly lower in priority than instability issues like: freezing, crashing and lag.
It is seemingly random, with many examples listed under Bug list topic of:
“You can make tile matches, they don’t register AP or damage, and tiles display incorrectly.”
In your case, of of the “3 green blocks in a row” one was not green if you hovered over each (looked at their descriptions) according to the game.
Because I know Jeto will ask 
, this bug occurs on all platforms. (Android, iOS, Steam, and Kindle)