Craig Boddington inadvertently shows the problem when ejecting a round from his 450/400 No. 1 in his Afrfican Rifles dvd. The case ejects, hits the safety and bounces back in! He then spends a little time clearing it.
I doubt that Ruger are not aware of the problem.
I had a new safety made for my No.1 450/400 and inletted into the tang.