Here's an old thread about the issue. Seems like it was around 2016. Looks like the cracks were at the same place as yours.
https://devialetchat.com/Thread-Cracked-...ight=Crack
https://devialetchat.com/Thread-Cracked-...ight=Crack
Living room: Kii Three/BXT with Control.
Den: Tannoy Precision 8 iDP with TS112 iDP subwoofer.
In the cupboard, waiting for a sibling: 1st gen. Phantom Silver running DOS1
My Phantom Voyage
Den: Tannoy Precision 8 iDP with TS112 iDP subwoofer.
In the cupboard, waiting for a sibling: 1st gen. Phantom Silver running DOS1
My Phantom Voyage