Unable to filter by label containing slash / symbol #151

It seems that / symbol which is widely used for kubernetes labels is not supported.
My app.kubernetes.io/name label is for some reason converted to app_kubernetes_io/name (dots converted to underscores) and when I try to filter:

~app_kubernetes_io/name = "backend"

I got this:

Bad query format: ~app_kubernetes_io/name = "backend": Failed to match sequence (EXPRESSION subquery:(SUBQUERY?)) at line 1 char 1.