Validation seems to work wrong with '9999' pattern

[MTschannett]

Hi,

i found a issue, when using a pattern like '9999'.

First my object with pattern:

Now it has following behaviors, which i think aren't correct:

Here we have one number and a few letters, which validate to true. But it should only be true if we have numbers.

It is even true, when only text is entered, but it we want a pattern of optional numbers. So it should be false because we have text.

If only numbers are submitted it works correctly.

If we process a string only value, it strips them away, which is a good behaivior in a way, but it would be nice to have a correct validation behavior.