What happened post invasion and whether that fit the notion of NATO members definition for legality is definitely up for debate but we’re there any serious cons

What happened post invasion and whether that fit the notion of NATO members definition for legality is definitely up for debate but we’re there any serious considerations that invoking article 5 in light of the attacks was not legitimate? I’d need to see some documentation on that as, as far as I am aware, every NATO member responded to the call and did not leave NATO