It should be standard practice for the operator of a firearm to check whether it's loaded with blanks or live rounds. Pushing that responsibility off to an 'armorer' invites situations like this.
(And probably the actual protocol of "armorer handles gun and shows what's being done" is safer if you ever involve blanks than having an untrained actor fiddle with a gun)
https://www.hitc.com/en-gb/2021/10/23/who-is-hannah-gutierre...
"Baldwin removed the gun from its holster once without incident, but the second time he did so, ammunition flew toward the trio around the monitor."
Suspect that Hollywood doesn't use blank firing adaptors like the US military which leads to a much more dangerous situation. Believe they do this for realism.
In the US military we'd take a number of steps to avoid these kind of mishaps.
safe weapon clearing procedures & intentional firing of weapon into sandbagged areas for hazardous conditions
Lots of Training about weapon safety
Team Leaders inspect fire teams
Squad Leaders inspect Squads
Platoon sergeants & LTs inspect platoons
Range Safety controls the whole show and may conduct their own inspections
Inspections include both weapons, magazines, and ammo pouches.
Our exercises never mix blanks with MILES gear, and actual live-fire exercises.
We don't fire weapons towards people at close range unless during warfare.
Military rifles fitted with blank adaptors are known unsafe at close distances.