Not getting extra mana when starting at higher waves?

[Bogdanov89]

I am doing my usual Ramparts Survival Nightmare (got up to a humble wave 14), so i started at wave 10.
After picking up all the chests around the map, i got 500 mana in total - which is the exact same amount i get at wave 1.

Is it intended that i have the same amount of starting mana at wave 10 as at wave 1?

Personally i find it impossible to do wave 10 with only start 500 mana, since by wave 8 (from start) i got all the towers built and upgraded to at least 1 Star.

Am i missing something, is this bugged or is it intended?
If this is intended, then this awesome feature is completely wasted since it is not possible to kill thousands of mobs with wave 1 starting mana.

[Lazerus]

noticed this too.
sometimes i get a high amount of mana, sometimes the normal.
at wave 8 it was normal, at wave 9 it was high...i think this was at magusquarter

[Bogdanov89]

noticed this too.
sometimes i get a high amount of mana, sometimes the normal.
at wave 8 it was normal, at wave 9 it was high...i think this was at magusquarter

Just to be sure i tried doing wave 10 on NM Surv Ramparts with 500 mana - but the 15 ogres that spawned quickly killed my defenses.
Not sure what is going on, but the "extra mana when starting at higher levels" feature is completely bogus.

[amiag]

It only works for the waves which wasnt previously accessible

So for example if you start on 8 you still get the base mana since you could start on that wave already. Wave 10 should give the mana increase tho, but not by much (I think on wave 10 is like 200 more mana).

Pretty much useless unless you have high enough stats already

[Alhanalem]

Extra mana should appear starting from wave 9. If you aren't getting more than 40/70/100 from each chest and you're starting on a wave of 9 or higher, then it's probably a bug.

//goes to check OP's example


edit: I got the increased mana from each chest on Ramparts survival.