Water flood at bottom side coming from sun roof??

[JosepM]

Hi. XC90 with just 1,5 y.old is now at technical service, with all electronics blocked due to completely water flooded.They arguing bad maintenance as looks like water and dirty comes from drain holes at sun roof. They note this is out of Warranty, but nobody from Volvo introduce me this potential issue never and during regular maintenance service at official tech service, nothing was reported.
No leakage, no warnings, no visual signs before.
Has anybody suffers similar situation? Advices welcome.