Enabling mobile hotspots through restricted accounts (6.0.1)
The hotspot can programmatically be turned off through apps. For example, an app called CamScanner takes camera photos of receipts or invoices and can email them as PDFs or image files. If there is no 4G signal available, it will enable WiFi, which disables hotspots by default. This will effectively disable the hotspot despite not being on an admin account.