AI problems with Create Black Hole?

[Rexxx]

I designed a Create Black Hole Ship for my EEE. It seems that the ship is never used by the AI. It travels through the quandrant, makes itself comfortable in the central stellar mass, but nothing more.
After realizing this behaviour I switched the empire to human control with "complete AI on". Again the minister moves the ship into the sun and then instead of blowing up the whole system a message appears: "Ship XYZ does not have the required supply to power the component". Well, it is equipped with a quantum reactor, supply shouldn't be a problem.
Next test: After receiving the message about lacking supplies I switched off minister control and used the device manually. No problem, the black hole is created.
However, every time when I take control over the ship it is still cloaked (it is equipped with stealth armor).

Are there any known AI problems with the create black hole device in combination with the quantum reactor and/or stealth armor?
Any advice will be appreciated.