IE8-11 enrollment by google authen not success via web portal when hit enter button

IE8-11 enrollment by google authen not success via web portal when hit enter button

I'm testing enrollment process and found some problem only on IE8-11.
When try to enroll by google authenticator.
1. user log in web portal.
2. user scan qr code on web portal
3. user enter 6 digit code
4. user press enter button on keyboard !!!!! instead of click enroll button
5. There is message show successfully enrolled!

6. click on enrollment tab again to check not found red message you have already enroll.

7. check on enrollment report. show -NA-

8. If click on enroll button in web portal and success. Report will show like this


This problem happen on IE browser but firefox, chrome, opera not found this problem.
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