Luxury Vinyl Plank glue failure

[Lisa Thiessen]

I have a concrete subfloor with glue-down luxury vinyl plank (LVP). I did not install this floor, so I don't know the age, brand name, or if the manufacturer's installation guidelines were followed. Most of the floor is in good condition, but in several places, the planks have popped and curled.

The glue under the planks remains sticky, but seems like it isn't strong enough to overcome the curl of the plank. I have attempted to apply new glue and restick the planks, holding them down with something heavy to promote adhesion. Unfortunately, when I remove the weight, the planks curl and pop again. 

Has anyone experienced this issue? Any advice on how to repair other than completely replacing a mostly good floor?