after reading the reported issue and the coresponding discussion, maybe someone find my temporary workaround useful: don’t mix up fixed/raw numbers with calculated ones. Use only calculated…
instead of
{{ if eq ( mod $c 4 ) 1 }}
use:
{{ if eq ( mod $c 4 ) (add 1 0) }}
but {{ add 0 0 }} is not working for 0, use {{ sub 1 1 }} …
this works for me 