Weird continual increasing degree

Today I just manage to run the robot arm, after I calibrate @ Rest position, I tried jogging but notice weird scenario.

1. I jog J1 for +/-10 degree, the J1 move none stop to left/right (depends on i press + or -), I need emergency stop it

2. I jog J2 -10 degree, it moved as expected, I jog +10 degree it no moving. Same with J3

3. There is others issue but I think come from same root cause.

Then I notice at Main Control J1-J6 all the degree keep increment eventhough the robot is not moving and I no perform any action. I think this is the main reason cause the error. Anybody have this experience and have clues for me?

Thanks in advance,

Edit: I'm added video to further explain:

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I press emergency stop button

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calibrate rest position

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the angle all remain the same (as expected)

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released the emergency button (J1-J6 angle value start changing, but arm no movement)

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press emergency stop button (it stop changing)

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release emergency button (J1-J6 angle value changed, arm still no move)