Uruk-Hai and Grond - 3 round limit?

[Homba]

Uruk-Hai and Grond cards allow 3 rounds of battle. Afterwards, can you exchange an elite for a reg, and continue to a 4th round?

Or are the attackers worn out and must stop? It isn't a combat card... it's an event card. Maybe only 3 rounds were intended?

Seems ambiguous on the original game cards - however in the supplement rules and FAQ, it seems clear that continuation beyond the 3rd round of combat is allowed if an elite is available.

How do you play it? Same in original game, and in supplement, I assume?

Thanks

[Krieghund]

It's the same in both.