Caret skips to second digit on focus when phone number already present

[anjhinz]

Can be seen here:
http://plnkr.co/edit/CDG941601WdHPMEdlEdG?p=preview

Type a phone number (that does NOT contain any 5's). Shift+Tab to lose focus, then Tab to focus phone number text field. Cursor skips to after the first digit after a half second pause.

Update: Problem seems to be from both 'focus' and 'keyup' events being handled, both moving the cursor one forward because of the "(" in the placeholder.