Aggregated interface using OSPF issue

Hi,

I have a 4100 SRX with 2 interfaces in a aggregated link (ae0).

It peers to 2 switches in OSPF. It peers fine to one switch (goes to Full in OSPF) but gets stuck in init in OSPF with the other switch.

Is there anything different in the config you need when using aggregated ports in OSPF?

Thanks