I am able to play with my friend - we both enabled matchmaking by password, we are both using Warriors of Sunlight covenant (so our cooperation could be jolly), our soul levels are in range, host has the power of the Lord of Cinder.
But after failure (one of us dies) or success (boss kill) we are not able to reconnect immediately. Host just can't see summon sign. We've tried restarting game, teleport to Firelink Shrine and back to location, replacing summoning sign, even attempted to use Dried Finger item (Way of White item was unusable in our case) - no luck. Eventually things just go back to normal and host starts to see symbol again.
Does summoning has any known cooldown? Are there any techniques which could help us to connect more reliable?