Every 10 seconds, far away from coast and shallow waters, whatever her direction from and to the wind, my basic Lynx stops during 1-2 seconds and then starts again for 10 seconds. On and on... All the time. At each session.
No FPS drops (FPS is between 40 and 60), only ship deceleration and acceleration (variations in speed)...
No sail changes, no direction changes. Moving in a straight line. No key pressed on the keyboard.
Just an AZERTY keyboard with a QWERTY setup (english). It worked wit