Car alarm just went off..

Hi all, my car went in for a Nissan used car Welcome check today, basically they carry out a Nissan inspection and check all is up to scratch.

This evening the car alarm randomly went off..no windows open, it’s a fairly cool evening etc..

Is this a known issue with Ariyas or maybe Nissan accidentally did something that’s now caused a random alarm trigger?

Anyone else had this issue? TIA!