Why do I keep destroying aluminum radiators?!?

[FLYNAVY30]

My truck is a 1972 C20 Suburban with an iron block 6.0L LS swap. I've been running Entropy's aluminum, LS swap radiator since I built the truck 10 years ago. My third radiator, which is just under 2 years old, started leaking from the core again today.....I'm assuming due to electrolysis and the aluminum welds failing.

I'm at a loss at this point. The radiator sits on rubber isolators but it has a grounding strap from the aluminum body to the frame of the truck, as well as a sacrificial zinc anode that is grounded directly to the battery per Entropy's instructions. The motor is grounded to the frame with a 1 inch braided grounding strap and the battery is grounded to the engine block with a 0 AWG cable.

Any thoughts or insight would be greatly appreciated. I've never had a problem like this before running an aluminum radiator.

Thanks!