Renderer behaves unexpectedly with extension on repeating element.

[RichardTON]

Describe the bug
I think that CSIRO renderer has one instance of an extension for ALL instances of a repeating item.
while the LHC renderer has one instance for EACH instance

To Reproduce
See https://chat.fhir.org/#narrow/channel/179255-questionnaire/topic/Definition-based.20extraction/near/482940370

Expected behavior
Consistence between renderers

[fongsean]

Hi @RichardTON, thanks for raising this!

It's a known issue and is a core functionality of how FHIR questionnaire renderers are supposed to behave, but it's not an easy one to fix - I imagine there would be an overhaul of how the renderer processes FHIRPath expressions with repeating items/groups.

I'll tackle this eventually, but at the meantime you can refer to LHC-Forms for the correct rendering.