Ion-datetime not working when using dayValues input propertie

When using the dayValues attribute in <ion-datetime> like the following (Im using Ionic 2 latest Beta 2.0.0.-beta.11)

<ion-datetime formControlName="date" displayFormat="MMM DD YYYY" dayValues="29,30"></ion-datetime>

i get the error as:

browser_adapter.js:84 TypeError: Cannot read property 'value' of undefined
    at DateTime.validate (datetime.js:473)
    at (datetime.js:346)
    at DateTime._click (datetime.js:309)

What could be the issue for this? Note Im Using 2.0.0.-beta.11

I’m having the same issue (using 2.0.0-beta.11).