Hi! Unsure if this is a bug, I'm fairly sure it is though. If it is not, then I am sorry for wasting your time.

Below is a screenshot of my breeder design. I placed Depleted NetherStar Isotope cells next to my Uranium cells.

And here is an "after" screenshot where they turned into Re-enriched Uranium cells

Forge: 10.13.4.1614
IC2C: IC2Classic-1.7.10-1.2.4.jar

Absolutely not a problem. Thank you for maintaining my favourite mod in Minecraft :)

Thank you.
I can't promise that i can fix this bug in a relative time because I have a extremely busy time period coming up.
So it might take like a couple months before this is patched.

But it will get patched with the next patch.
TY