Fix the hang when OnUserCreate return false on MacOS

[Johnnyg63]

Same issue as reported by #312 for windows and again for #324
The MacOS is also hanging when returning false in bool OnUserCreate() override

Returning False from OnUserCreate
https://github.com/user-attachments/assets/37245ccb-19ea-4912-9794-3e64e4770788

Rerturning false in bool OnUserCreate() override isn working as expected

Returning False from OnUserUpdate
https://github.com/user-attachments/assets/92ef0568-a5dc-4c14-80b4-2542e0412ca9