Hi everyone I recently had a small extension built and at the same time, new kitchen/diner floor and kitchen fitted. There were remnants of an old water leak under the old floor, it was completely ripped up back to the concrete then a new sub floor put in, beams, 120mm celotex, ply and chicken wire, then Mapei Keraquick rapid-set flexible tile adhesive used and grouted with Mapei Ultracolor Plus Grout for the high quality 60x60 Italian porcelain tiles. It was completed at end of August 2019. I'm getting clicking noises on some tiles, a few tiles don't look quite flush with the others and I'm getting some cracking in the grout. Some pictures of the new sub floor and the tiles, cracks etc at this link: https://drive.google.com/folderview?id=1INnkaP_A5XgTGl0GTpcNI_Cr6iMFQOT2 All the work completed by the same builders and guaranteed for a year. What would you suggest I do and what do you think the cause and fix is? Thanks!