Wood Laminated Floor "bubbling"

I had a wood laminated floor installed 4 months ago over a cement slab. At first it was fine. After about a month or two one area of the room started to 'bubble up' like it had air pockets under it. Now other parts of the room are doing this, as well, and the pockets move around. Any idea what the problem is?

 

At first when you said bubble I thought you were talking about moisture getting into the plan's core causing the wood picture to bubble. But you say the whole floor is kind of flexing up and moving around like air is under it?

I'm only just starting to look into laminate flooring so I'm no expert, but from what I've read indicates that laminate needs room to breath, I guess it expands and contracts as temperatures change, atleast that's one factor. This is why when the flooring is installed you must leave atleast a quarter inch of space between the laminate and the wall around around the room. When the baseboard is installed that covers up this gap.

I'm guessing a possible cause for your problem is there isn't enough room around the edge of this floating floor to move and thus and flexes in on itself. So could the installer didn't know about this step, or did he do it right and some other factor like many extremely heavy objects around the room.

Can you remove the baseboard to see how close it's against the wall when the trouble happens?

Also, when putting the laminate on a cement subfloor, a moisture barrier is needed underthe padding, I was worried you didn't have that at first when I misunderstood the bubbling thing as a water problem. But who knows, maybe water could cause this type of effect when on a greater scale like no moisture barrier. Is your cement subfloor the laminate is over on the ground?