Filename Prefix can't be set via concatenate nodes

[alFrame]

Custom Node Testing

• [x] I have tried disabling custom nodes and the issue persists (see how to disable custom nodes if you need help)

Your question

I have a problem with setting filename prefix. Whichever "Image Save" node I use (core, or custom nodes), it seems that I cannot pipe the filename by using nodes like the tinyterra node called "3x TXT Loader MultiConcat".

Especially things like %node_name.widget_name% are written out in the filename and are not "translated" into the node_names and widget values.

I have tried numerous things, to no avail. I wonder if this is a known limitation?

Attached is a screenshot. I'd appreciate any help on this.

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