If you accidentally disconnect your customer-facing Clover Mini from a tethered Merchant Keypad, a merchant-facing Clove Mini, or Clover Station, your customer-facing Clover Mini will switch into merchant-facing mode and display the PIN login screen.
Reference Site: https://help.clover.com/faq/what-will-happen-if-i-disconnect-my-tethered-clover-mini/