UPDATE:  I spoke with D-Link tech support.  They theorized it was an app compatibility issue with my device and/or android version.  They asked for specifics and said they'd investigate but I would not be notified and would have to discover on my own if it was fixed or not.
I decided to purchase the MyDlink+ app (99 cents).  Instead of giving my MyDlink account credentials, I just chose "Local cameras".  No more time outs -- and it does look better on my tablet.  As a precaution, I also disabled automatic app updates in Google Play.
I'm wondering if a workaround in the mydlink lite program would be to log out, close mydlink lite, then open and NOT log in -- just select "Local cameras".  Hopefully this will help someone else.