Timing chain

My timing chain on one bank has been loose, I presume a faulty tensioner. It slaps on startup and quickly catches up.

Last night while driving down a hill not under load, the engine just stopped. I hit the gas, nothing. The engine light came on, no other dash lights.

I hear nothing in the engine that would indicate a chain breaking, but do not know if I had heard something like that or not.

I tried restarting and it just cranks, but "feels" like only one side of the engine is cranking so I do not know if Ford designed a fail safe to prevent valve fouling if the timing chain did break.

Does this sound like a broken chain? Or maybe the chain jumped teeth and now it is just way out of timing? There is no sputtering, etc, no combustion at all.