Elytra costs 35 levels to repair?

This is normal, see http://minecraft.gamepedia.com/Anvil_mechanics#Unit_repair

Use a second Elytra and the Crafting Table for repair: http://minecraft.gamepedia.com/Elytra#Repairing

I think this should be resolved as Works As Intended, not Invalid.

But it costed 4 level to repair it every time before, then I put it in an it all of a sudden costs 35, that makes no sense on any scale at all.

Steps to reproduce ?

I observed that the more times you repair something on an anvil, the more levels it costs to repair it.

Invalid unless someone provides a source for this claim:

I'm pretty sure iirc that the Elytra is suppose to be infinitely repairable.

@unknown: What you describe is the normal repair cost penalty described in the wiki (link above)

Well we are not really here to determine whether they SHOULD or SHOULD NOT be infinitely repairable. But another bug came out of this which is that they only cost 4 levels to repair every time until you get to the last repair, then it is 35 levels, then can't repair. Steps to reproduce are given by Bren Rado

Reopened. But then rephrase this as someline like "Elytra repair cost jumps from 4 for the first x repairs suddenly to 35" and copy Brent Rado's steps to reproduce to the description.

Can't reproduce. Cost is multiplied by 2 after every repair.