An unusual issue this, controlling the speed on continuous rotation servos with the myservo.write(val) command. If val=90, no rotation. If val 0-89 or 91-180 increasing speeds in alternate directions respectively.
'Twas all working superbly one minute, and now the servo continues to rotate in the same direction regardless (and I did literally, literally(!) nothing to it).
Even with a direct myservo.write(90) command which it should obey and not rotate it continues to rotate.