Hard to say whose fault perhaps.

Anything exposed to the sun with expand ans shrink to temp change, but by how much depends on the material. Not all tiles the same. The tile expansion and the cement behind it expand at different rate thus caused delamination. However, not to count out poor workmanship too but in this case possibly both 

The house is on rigid house frame. Normally on soft soil, they do piling. However, when soil eroded over time the house frame structure can stress also a bit and cause small crack like you normally see on wall. If there is tile on that part, the tile can become lose or even cracked as in my kitchen (hairline crack)

I believe the marble glue is another name for epoxy glue. Yes, normally it will solve the problem. Even silicone that meant for outdoor can withstand heat and cold like one used for gutter for about 20 years.

Been solving these type of issues with Duthaco's products. Lasting and permanent.

Try Google 'Duthaco'