seriously guys? it is the exact same thing. if he got the other one apart already, it takes a second to notch it where the screw(s) sit. in his case 2 of them. rc4 likely had a bad batch or a cheap/newer one. i have had issues with them too with various parts.
here i just took apart one of my brushless to show you
you can locktite it all day long and it wont hold. you need an ident for the screw to grab. else it will spin 9 out of 10 times especially on these high torque motors.
now im surprised you dont see the marks of the screws grinding against the shaft, right? any of those there?
if not, there could be a thread issue on the housing and it isnt deep enough to allow the screws to go all the way down to grip.