Steps to replicate the issue (include links if applicable):

• Add an image, but do not include alt text
• Add missing image alt text appears, tap Add
• Tap/hold the text entry to reveal text entry menu

What happens?:
Autofill appears, but no paste option appears

What should have happened instead?:
Paste should appear

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):
Tested on 7.5.8 (3955)
Other information (browser name/version, screenshots, etc.):
Note - Paste works fine on the initial alt text entry field, but does not appear on the add missing alt text entry field.
Alt text entry