Garmin Edge 540 restarts or shuts down after stopping route with 26.18

Very annoing issue: after each workout/route when I stop the stopper and I try to save the route, the device shuts down or restarts.

I tried to reset to factory and delete all data, but it didn't help.

I can it reproduce easily. 

This issue was in the 25.24 version, and it persist in the 26.18 version as well.

I use only default settings, no connectIQ fields or etc.

Can someone help me to solve this problem?