Honestly, I have heard all this stuff before...but when you break down the actual weapon the chamber does properly support the round.
I think this may be a myth or, indeed, an "atypical" manufacturing defect that has been spread around about the weapon buy competitors. (Wouldnt be the first time.)
It's a reliable firearm. Moreso than my 1911A, which though an accurate weapon, is tempermental and needs constant care.
At the end of the day nothing's better at defending your life than a good ole S&W .357.