zoompan filter issue

Hi Falks! Im trying to apply zoompan filter to my stream, using this awesome library. I use this command: <img width="325" alt="Image" src="https://github.com/user-attachments/assets/2ef9ea60-4a23-4935-8715-a185c4a2ef52" /> And when it is done with render - I'm just getting video without effect applied. I checked what happens under the hood and thats what I got: <img width="928" alt="Image" src="https://github.com/user-attachments/assets/aca31883-5919-48f2-849c-0696112aa7c0" /> Final command looks broken, because argument `zoom+0.0015` has not been passed correctly. It supposed to be `z='zoom+0.0015'` Are there any workarounds? Thanks!