Mob rideable but not controlable

Hello,

I've upgraded to MCreator 2025.1 and Neoforge 1.21.4 (21.4.101-beta). 

Before the upgrade, my mod had a mob which used to be rideable and controlable. Since the upgrade, I can still ride my mob, it's still strafe controlable but it's no more forward controlable. 

Any idea for this new behavior? Would it be linked to MCreator or Neoforge upgrade?
Thanks in advance for any help!