Route redistribution flaky?

Hello
I’ve got a 4 way load balanced PCC wan setup. All four inject default routes with the same distance, scope and target scope
I have an ospf v2 instance with the following route filter:

Flags: X - disabled, I - invalid 
 0   chain=ospfv2_rule_out match-prfx-value=dst<equal>0.0.0.0/0 
     set-ospf-ext-type=type1 action=accept 

 1   chain=ospfv2_rule_out match-prfx-value=dst<subsumes>172.16.0.0/12 
     action=accept 

 2   chain=ospfv2_rule_out match-prfx-value=dst<subsumes>192.168.0.0/16 
     action=accept

Sometimes ospf injects and redestributes a default route, and sometimes (randomly?) it doesn’t.

How can I debug this further?
export.txt (13.7 KB)
export.txt (13.7 KB)