BGP sessions up while BFD down

I'm testing some BFD and BGP configurations.

I've got two QFX10K switches connected directly together and a simple BGP configuration between them.

I've also got BFD configured under BGP and it all seems good.

One one QFX i then applied a RE filter to deny BFD traffic (UDP) to test what happens when BFD fails. What I see is the BGP sessions is instantly brought down due to BFD going down.. I see these logs:

Mar  1 22:39:02 qfx-test1 bfdd[1458]: BFD Session 10.1.1.0 (IFL 575) state Up -> Down LD/RD(17/18) Up time:00:18:43 Local diag: AdminDown Remote diag: None Reason: Received Upstream Destroy Session.
Mar  1 22:39:02 qfx-test1 bfdd[1458]: BFDD_TRAP_SHOP_STATE_DOWN: local discriminator: 17, new state: down, interface: irb.10, peer addr: 10.1.1.0
Mar  1 22:39:34 qfx-test1 rpd[1453]: BGP_RESET_PENDING_CONNECTION: 10.1.1.0 (Internal AS 10): reseting pending active connection

So the BGP sessions goes down for about 30 seconds, but then comes back up, even with BFD is still down.  Is that normal behaviour?  I would think that is BFD remains down, BGP should also stay down...  

thanks.