What’s happening to this floor? Advice needed

[Bian Dahab]

Hi all, 

I got a new construction home with a beautiful hardwood floor. I moved in at the beginning of June and have been noticing these floor damages happening over time. I noticed one in July and now there are four spots like this.

Any idea what’s happening here and whom should I call to fix? Pest control or floor company? 

Terminix inspector stopped by and said he doesn’t see any sign of termites. There is a crawlspace under the floor and he said it would be hard for termites to enter from the ground.