CP370 with M260 Loss of Bottom and Depth

A customer with a CP370 and an M260 transducer is losing his bottom lock and depth after coming off plane in approximately 65' of water. He has tried power cycling his electronics which includes an E Series Wide MFD. It may take up to 2 hours before he regains his bottom picture. His M260 is topped off with marine antifreeze and the correct transducer is selected using 200 khz. All units are at the latest software version. I was unable to attach a short video he took after this occurred. However, I did attach a jpeg file that was distorted after the conversion process. Any suggestions would be appreciated.

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