LUKS shows asterisk at boot?


I’m running 4.1 Qubes OS on my Lenovo x230 along with Skulls to remove intel_me.
So far I don’t have any problems and I’m very happy, there is just one thing I noticed which irritates me.

After the booting screen of Skulls and when Qubes asks me to enter the password, it already shows exactly four asterisk symbols I first need to delete in order to type in the password correctly? Anyone have an idea?

I don’t see the asterisk symbols in Qubes OS boot screen but when pressing F12 to see the luks setup.