fix FIM RNG issue
jenkins jenkins jenkins jenkins jenkins jenkins
# What does this PR do ?

This PR fixed the issue relating to FIM training. This old implementation re-initialize the rng every time invoking get_text, which will breaks the effective prob for FIM rate.

  
**PR Type**:
- [ ] New Feature
- [x] Bugfix
- [ ] Documentation

If you haven't finished some of the above items you can still open "Draft" PR.


