Prefix and suffix cannot be a number

[paulosteffenm]

If you want to have a number in Prefix/Suffix the input field does not work.

For example:
<input
currencyMask
[options]="{ prefix:'9', thousands: ',', precision: 0 }"
type="text"
class="form-control"
id="Revenue"
name="Revenue"
formControlName="Revenue"
[ngClass]="{ 'border-danger': isInvalid('Revenue') }" />

This causes the input to add 9 every time a new number is added.