antizer-examples warnings

[gmp26]

antizer-examples (rum-flavour) throws multiple warnings of this nature:

bundle.js:1710 Warning: Each child in an array or iterator should have a unique "key" prop. 
Check the top-level render call using <Card>. 

These warnings are suprisingly sticky. They are not switched off by adding the usual keys or rum/with-key calls e.g. to
https://github.com/priornix/antizer/blob/master/examples/src/antizer_examples/rum.cljs#L50
and
https://github.com/priornix/antizer/blob/master/examples/src/antizer_examples/rum.cljs#L52

[sooheon]

I am getting the same warnings, whether I try with-keys or with key-fn mixins. Reagent, if you pass in a :key in the argument map, does not throw these warnings.