[m1n1vv]

If you put 5 vehicles next to you in which Num Lock is used, it won't work in one of the vehicles.

For example:

• All lowride vehicles
• Forklift
  
• Dozer
  
• Towtruck
  
• Hydra
  
• Packer
  
• Etc..

[FrostHelper]

But wait a second.This has nothing to do with the SA-MP client.

- I conducted this experiment and your hypothysis was not confirmed, alas.

Maybe, I'm very wrong,because I didn't know which SA-MP client you were working on.
But in any case, on version 0.3.7 SA-MP and in the original GTA-everything worked without such incidents.