I've had that happen a couple of times it just went in a 50' circle at rabbit speed, I just reach down and unplug the trolling motor plug wait a minute the plug in and start over

Spot lock on my unit is a joke most of the time

just like no more updates on my 1198 si and my 1159hd DI units, 1159 still has a glitch when switching transducer on the sonar screen it jumps to the alarm screen and still no volume control on the unit ??