I don't know much about Inovar. Each piece is interlocked to each other. For me, 1mm gap is visible and not acceptable. The expansion gap is hidden under skirting at the wall about the thickness of the plank itself or 1/4". The floor panels should expand and shrink due to change of temperature day and night and should push and pull each other leaving no gap.

There are manufacturers spec for their product such as how long the laminated floor can span before needing expansion gap, which they need to use T profile. The distance is different for long and short end, like 40' for long end and 20' for short end. If not the interlocking will not work properly leaving gaps.

My floor is already 10 years and no such problem except noticeable (about 1mm) gap on small area exposed to rain all day long while I was at work because I forgot to close the window but that was 8 years ago perhaps  . Mine is no big name local brand. I'm trying to recall the name 

This is my experience and I don't know much about others. Perhaps anyone using Inovar can tell theirs

Do you hv a photo of your flooring? Seems a little unusual to me.

Can ask Inovar go and touch up, is unacceptable, if they dont then you can get other ppl to help you fix it.

The first top two pictures are not acceptable for me.

The others though not that bad but it was caused by poor installation. Some cases, the plank itself defect such as it curved a bit but that is not your problem. They need to replace. In some cases, the installer did not align the plank straight thus causing a bit of gap on one end.

I bet they don't have this. They will just jump and slide with their feet. You can also do that but it is not your problem 

Putting silicone with affect the look of the overall flooring.
Agree with Zot, either they fly in with kungfu kick    to slide the board back properly or hv the reinstall that portion for you.