Floor tile came up - how to fix

[Chrisjs]

Had my bathroom floor done a year or so ago and noticed for a while now that one of the tiles next to the door was moving when walked on. I've taken it up and wondering how to fix it now - can I just take out the rest of the old adhesive and then re-lay?

The floor is chipboard with jackoboard then proGrid UFH. The tile came up easily and cleanly with no adhesive left on the back so not sure if it just wasn;t put down properly or if there is another issue. Hoping the rest of the floor is ok...

 

[Rae]

Never put down properly,looks like it wasnt back buttered ,hope its just one

 

[Bond]

Seeing the pattern on the surface of the adhesive like that, as suggested above , no back buttering of the tile. Also very little covering to the mat.

 

[Wayne Brown]

I personally would like to of seen a flexible SLC compound applied over the floor before tiling as above bad practice really .