Resolved 2x.

(1) way:
historic=ruins
name=de eerste burcht van Kuinre
note=reconstruction of the foundations of the "moth castle"
ruins=castle
(date: 31/10/2020)

(2) node:
access=yes
historic:civilization=medieval
historic=ruins
inscription=Gedeeltelijk gereconstrueerde ruine van de Kuinderburcht.
name=Kuinderburcht
ruins=castle
source=local knowledge
(date: 17/12/2020)

Remaining issue:
[ruins=castle] is in OSM database, but not always Rendered on the Map.
Redundant Mapping does not resolve this issue. This is for the Renderer to resolve.