Hide the PIN entry on stock lock screen

Is it possible to hide the visual feedback on the PIN entry on the Android stock lock screen?

The feedback makes it pretty easy for anybody standing near to watch the PIN:

enter image description here

I know that it is possible to disable the feedback when using a pattern, and I read tips that the pattern setting would also apply to the PIN entry, but I tried that and it didn’t work.

I usually use the finger print sensor to unlock the phone, but on the rare occasions when it asks for the PIN (“for security”) I always wonder why anyone would design a PIN entry screen like this.

I don’t know if it matters, I’m using a bq Aquaris X. The Aquaris X5 I used before that had the same behavior (with Android 7), the HTC One before that did not (IIRC .. it’s been a while).