Need to fix buckling LVP?

[Andrew S.]

Curious on others opinions and wanted to share my learnings.

I installed a thinner vinyl plank (Shaw Matrix) with a 2mm laminate/ hardwood foam underlayment material. I purchased tis underlayment because it had a shorter lead time and was cheaper.

The thinner vinyl in my kitchen is buckling near the fridge and stand-up freezer. The thinner vinyl isn't truly floating on the soft underlayment. 

My plan is to pull up the planks, lay down new 1/4" plywood underlayment above the old uneven hardwood floor then re lay the planks. I don't think I want to leave the buckled planks. I'm house hacking this unit now so it's easy for me to repair.

Curious if anyone has went through a similar situation and came up with a different solution. Thanks!