[exim] Bounces for thawed messages also frozen

Exim 4.61-1 (Debian, but I can't see how this could be Debian specific).

I have a redirect router that freezes some messages by setting

data = #Exim filter\nfreeze text "Some message"

When such a message is thawed, it's not frozen again by the same router,
because "The freeze command is ignored if the message has been manually
unfrozen and not manually frozen since". So the router declines, if I
understand correctly.

The next router, also a redirect router, expands the original address into
several new addresses, of which some are local but nonexistant. Exim promptly
generates a bounce message for these, but then freezes the bounce message
with the previous freeze text ("Some message"). Is this intentional? (The
return address of course does not match the freezing router.)

--
Magnus Holmgren
holmgren@???