Then you need either move databases to SSD: How to move DB’s to SSD on Docker or wait more time, if the disk is slow, it could take several minutes to load a dashboard. You can also remove cache for this address, the browser should load latest version of the dashboard.
the usual “context canceled” errors - your node was slower than others for this customer.
Your node cannot win all races - it cannot be close to every customer in the world, so this is normal.