It is unknown how to replicate this, and it is confusing to certain players. A possible to execute certain actions to do this. But it just makes your level jump from what level you are currently at to a higher level. An example:
Level 1 → Level 54
It's hard to explain for many players. Fighting monsters and doing random things such as changing "armor" and such will then obtain the exploit unintentionally. It`s unknown if this exploit was patched in the recent versions. It happened during version 1.6.
It is unknown if it is fixed, but on the computer if you continuously minimize and maximize the tab sometimes the chests will show up twice (about 1/2 a second apart) and you get the rewards of both chest. This also works with spells(double spells). You could take advantage of this to get parts for a mission twice as fast but it is hard to do and sometimes doesn't work.
Rarely, Fire can do more damage to Water monsters. This is a uncommon glitch.
Misplaced character bugPlayers can walk on blocked places such as walls while you can't. So they can go out of bounds (out of the map), and others.
Double Map Bug
Sometimes if logging on to your account on 2 different taps you will find decorations from the first map overlaying the current map (however this is purely graphical)
If your computer/mobile device goes into sleep mode during an arena battle when you reopen your computer you will be stuck in it and lose 50 trophies.
Question Correct Bug?
(Simplified explanation) "You get 5 dollars a hour, if d is total dollars and h is hours then what is the equation?" (d = 5 * h) This question seems simple but you cannot say d = h * 5 even though d = h * 5 (Incorrect) is equal to d = 5 * h (Correct). It is unsure if this affects any other questions.