n8n resolves every parameter against its displayOptions when it builds a
Workflow, before any execution exists. A displayOptions on a child of a
collection or fixedCollection made that resolution loop, so image runs
answered HTTP 500 in under a second and left no execution record at all.
Drop those four displayOptions and say in each description when the field
applies, then build the Workflow twice in the validation test - with every
collection present but empty - so this cannot come back.
