My builder just recently installed Coretec Grande Lotte Oak in our brand new build. The flooring is beautiful, but upon closer inspection I’m noticing what looks like gaps where the short ends meet. I have included a photo with the gap and without. It looks like the flooring isn’t locked in. Am I imagining things? He ordered the flooring from e floors and had his workers install it. I’m not sure what to do. Any suggestions, advice or help would be greatly appreciated!