🐞 bug report

Is this a regression?

No

Description

I need to show only the first four numbers of SSN. Secure input works well without showMaskTyped, but with turned on showMaskedType it doesn't hide numbers at all.

🔬 Minimal Reproduction

demo

🌍 Your Environment

Angular Version:

@angular-devkit/architect          0.1100.1
@angular-devkit/build-angular      0.1100.1
@angular-devkit/core               11.0.1
@angular-devkit/schematics         10.2.3
@angular/cli                       11.2.3
@angular/material-moment-adapter   11.0.1
@schematics/angular                10.2.3
@schematics/update                 0.1102.3
rxjs                               6.6.3
typescript                         4.0.5

Anything else relevant?

No