After his spin Sainz let the car roll backwards to get it off the the racing line, which is exactly what he should have done. Albon tried going behind him to lose as little time as possible, which is also the right thing to do. It was just an unfortunate incident.

I am more surprised at Red Bull not getting a penalty for asking Perez to drive back to the pits with that dangling wing, all to avoid a red flag!

That was way too risky and an intentional action. Sainz just did what he was supposed to do