Does the chance of a treasure chest change per level?

Is there any difference between the levels in view of the treasure chest spawn chance?
I know that there is a relic which will raise the chance of a treasure chest by 20% per level. But I have some levels where the treasure chest nearly appears all 5-10 enemies and I have some levels which seem to spawn no treasure chest. Watched it for quite 5 minutes which killed nearly 300 enemies, but no treasure chest at all.
If there is a difference, how can I determine it?
Best Answer
I don't believe there is any difference between the treasure chest spawn rate depending on what level you're on. It's a base 1% whether you're on level 100 or 1000%. Source
A maxed Dora will give you a +1000% percent chance of a treasure chest spawn; which works out to roughly 1 out of every 9 (or 11%).
Relics would also give you a boosted chance to get a treasure chest spawn; but I highly doubt it's per level. If it was; I'd think that eventually you'd hit a point where every monster is a treasure chest; and that would probably break game balance.
Pictures about "Does the chance of a treasure chest change per level?"



Masicka - History (Official Video)
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: Nataliya Vaitkevich, Nataliya Vaitkevich, Pixabay, Pixabay