We have been testing for this. Unfortunately this is not reproducible on all lakes in shallow water and so have had to get some feedback and sonar recordings from some who are experiencing this. Not sure when anything will be available but in the mean time try this:
- Make sure all other sonar units are off. Reset all the menus back to the factory settings using the Restore Defaults menu. Than go in and set the Water Type menu to the “Salt (deep)” setting and the Surface Clutter to 9.

You can also try loading an older software version as well. If you do not have the *.bin file for this you can get it off of the SideImagingSoft.com web site, from the Humminbird Customer Resource folks or by direct e-mailing me (I will be out of town this weekend).