TruClient IE - target object was not found running on controller

I'm on LoadRunner 12.50.
IE version 11.

I recorded a script in TruClient IE and it runs fine in Development mode as well as the load mode in VUgen.

But when I run the same script from the controller, that get pushed out the the Load Generators, I get messages "failed - target object was not found."  

The snapshots from the failures show a smaller-sized browser window during the run.  Smaller window size than the recording/development mode.  I'm guessing it couldn't perform certain actions because the location of the elements on the page get shifted around due to the small window size?

If so, how do I fix it?

I tried setting the Runtime setting > Other Settings > Non-interactive window size > tick the Apply window size by user > set the width 1280 and Height 1024.

That didn't help.  The snapshot still show a small capture.  Is there something else I can look into for this problem?

Thanks.