Does it still work?

[MoonMoon82]

In the example you show, all regions in all batches look like the color you defined. But in my experiences it just rarely hit it. What am I'm doing wrong?
Does it depend on the checkpoint I'm using? (ie. dreamshaper, chilloutmix)
Is --dont-upcast-attention relevant? (In my experience it doesn't matter)

ComfyUI_Cutoff.json.txt (slightly changed)

[ltdrdata]

Latest SDXL update broke several compatibility. Especially CLIP related...
But you can now use builtin-node ConcatConditioning instead of cutoff. Try that.
It's similar to BREAK on A1111

[BlenderNeko]

Non SDXL checkpoints should still work, millage may vary depending on the checkpoint. SDXL checkpoints for the moment will throw an error. As mentioned by @ltdrdata at the cost of some additional memory you can also use concatConditioning, similar to cutoff this isolates parts of the prompt.

[Duemellon]

I'm having a hard time finding documentation on the Conditioning (Concat) node. Is this what you're talking about?

Any examples?