general statement: There is a bug, still not fixed even with 5 minute FF on PTR, that has been around since LK beta where if misery is on the target FF cannot be refreshed except by someone with imp FF unless the debuff completely falls off.
now to specificaly answer your question:
where are you getting 3% crit from? that 3% crit is only for the moonkin himself and it applies as long as ANY FF is on the target from any source.
as for the 3% hit, if you do not with a shadow priest then the bear should never FF
either way as i said in the patch FF becomes 5 minutes and needs to be applied tops twice a fight (although i need to test how much threat it does now that they trippled the ap coeffient)

