"Remove Conntent" with Z-Image Turbo fails with 'NoneType'

Failure to run Remove Content function with Z-Image.

Debugging the workflow in Comfy, it looks that problem is in non-connected image input of ZImageFunControlnet node.

workflow.json client.log

Flow:

• select desired layer
• mark rectangle or circle
• use Generate with built-in Z-Image Turbo
• click "Remove content"
• Server error is shown