Dual Rinnegan Madara's Limbo's doesn't have set times.

[Rohan]

Agreed. Though Madara didn't blow up, he actually underwent a transformation.

 

[XY iNVeRSe]

No, his limbos still have a time limit, they just weren't out long enough.

They don't, that wouldn't make madara invincible.

Obito even said dual rinnegan madara is invincible. Thus madara himself being the reason he lost.

 

[XY iNVeRSe]

There's still people saying that madara's limbo has set times, and the damage goes back, you're wrong.