First time it was a fighter (Carabella) with Outcast ID.
This time a bomber (Praetorian) with Corsair ID.
Here are few images about battaries. I hope now you can really think that it's not okay with snub cloaks?
P.S. first cloak activation after undocking was successfull, and as you can see SS second one wasn't good.
Maybe in your second attempt of cloak, are you running out of batteries? its just an idea... tell someone to pick up more batteries and just drop them on space, so you will can tractor beam it and keep doing test being sure you will not run out of batts.