compat: ignore provider changes when not stateful

compat: ignore provider changes when not stateful

in callbacks for button events or other things which need a new
provider we canno listen to the provider events at this point in the
hierachy, as there's nothing we can trigger a state change on (or we
already are in a state change event callback, and must not recurse)

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>