in your first photo you can see all the joins in your floor are slightly raised, looks like the same issue we have with our bamboo.

Always read the warranty info, you will be surprised to find that unless your boards warp and twist (which in 15 years we have never seen) you are not covered…

I would be very wary of the arc bamboo. We have dealt with Premium floors on a professional level for nearly 15 years and have never had a problem…