Trash displays too low a value

PowerShell:

Get-ChildItem z:\Node-3\Storage\trash\ -File -Recurse | Where-Object {$_.LastWriteTime -lt (Get-Date).AddDays(-7)} | Measure-Object -Property Length -Sum | %{"Total {0:f2} MB`ncount {1}" -f ($_.Sum/1e6), $_.Count}

You may check that you do not have anything older than 7 days:

Get-ChildItem z:\Node-3\Storage\trash\ -File -Recurse | Where-Object {$_.LastWriteTime -lt (Get-Date).AddDays(-8)} | Measure-Object -Property Length -Sum | %{"Total {0:f2} MB`ncount {1}" -f ($_.Sum/1e6), $_.Count}

The dashboard took results from the DB, the DB is updated either by used space filewalker (after start), or by the trash chore (every 24h) or by the garbage collector (1-2 times per week) for each satellite independently.
Of course if these filewalkers are failed, they will not update a database.