Mira Logic Shower - Clamp Bracket Assembly
The Bracket Assembly is quite fragile in terms of wall thicknesses and as it is made of rigid plastic (probably ABS or similar) will be prone to cracking due to usage.
The cracks occur in two places
It will initially crack around the shower head holder due to possible excess manual movement of the shower head while you try to adjust the angle of water flow.
When the above occurs then a few days later around the central hole at the back.
As it was a new build property this is the shower that came with the house.
Personally, I would not have selected this shower arrangement but went for something a lot more robust and capable of excessive handling by people