Fuel not used, when at 0%, when warping from alien space back to normal space

Bug report:

 

You will use energy from fuel cells or reserve for each jump, but when you will be at 24%-0% energy (unable to jump) in Alien Space, you are still be able to jump back, through the portal to normal space.

 

Screenshot:

2lu5kex.png

I believe this is a bug. If it is, I will provide logs.

 

Is it a bug or not?

It is a feature