Incomplete log ins

Looking at some of the threads here, I feel a bit embarrased to raise this, but do so in case it has any significance.

 

First job of the day, after I open the vault, is to check my mobile phone account.  I have the log in screen bookmarked.  This takes a long time to load so I generally open a new tab to do something else until I see that the original page has loaded.

 

When I flip back to that page, the username's there, with the usual orange background, but the password is unfilled. This is rectified by hitting the Refresh icon.

 

Is this a deliberate software feature or just a niggle?

 

Thanks,

 

Ian