Spindle stops while operation

Hi everyone,
We have an problem with Pocket NC V2-10.We upgraded the software version to the most recent. Afterwards, the device did not turn on and we manually rebooted the BBB. When we replaced the board, the machine ran smoothly and made a few short operations. Then suddenly the spindle started to slow down and even stop. When returns to the idle location, it continues to work and spin as if nothing happened. We are not sure about this problem is related with software upgrade but it can be.
Has anyone experienced such a situation? If yes, did you solve the problem and how did you solve it?

I can not attach the video here, but I am sharing google drive link
https://drive.google.com/drive/folders/1Ce8K7sAbZUlqIsfE90RJw78gJTqCaJ1b?usp=sharing

Thanks a lot the community.

Hi Sami,

We received your email about this issue and will be getting back to you shortly.

Thanks,

Q Rothing
Applications Engineer, Pocket NC