Nuke General Challenge starts with facing the Nuke General and the video of the nukes blasting the tanks at the start of the challenge does not seem to end and it gets stalled! Am I missing something here?

Related thing here: In the beginning of the challenge against the nuke general, he usually uses nuke cannons and a nuke superweapon against the tanks. after the end of this sequence, there are usually no tanks left and there is a big sot of radiation.
Now (had it with two generals at easy difficulty) he doesn't use the superweapon and I am left with a few tanks (aprox. 4).
Bug or feature?

B2T: you play as nuke gen against nuke gen?

Probably it is a feature at easy difficulty. When playing at Hard difficulty, the nuke general's first challenge is against the nuke general and the sequence does not seem to end in order to start playing the challenge. As a result, I'm unable to play as nuke general in Challenge at hard difficulty. What should I do to be able to play as nuke general is the question now?

Its a known bug.

thank you for the clarification. I love playing the nuke general and hope that this gets resolved!

yes it is a common bug. i have read they gonna fix this in the next update.