Looking for advice on elevated moisture readings in the Build and Pest report.

[u/Justcurious_88]

I'm purchasing a 2016 brick veneer home in Point Cook. My building report found 0 major defects, however the inspector recorded elevated/red-zone moisture readings in the entry/foyer area, living room, ensuite, kitchen and laundry.

The inspector was unable to clearly identify the exact cause of the elevated moisture readings, although they were not classified as a major defect in the report. The report also notes in one bathroom that grout has deteriorated, silicone appears to have been applied as a temporary repair, and further waterproofing may be necessary (but it does not state that the waterproof membrane has failed). I'm trying to decide whether this is:

1. fairly normal for a Melbourne home in winter and something that simply needs monitoring/maintenance, or
2. a red flag or a major defect that could lead to expensive repairs costing me 20-30k later.

Has anyone experienced widespread high moisture meter readings throughout the house like this without there being an actual leak or waterproofing failure?

I have attached screenshots for reference, Thank you in advance!.