The unpaid supplier thing was something that happened in the depths of the development hell of the Model 3. There's been no word on it at all since earlier this year around June/July, iirc.

I think it boiled down to something like one or two suppliers being asked to return money on stuff they hadn't yet supplied.

Nothing since then on it, and the lack of news about unhappy Tesla suppliers would seem to indicate that it's no longer a problem.