Unexplained Z movement

I was hoping someone could help, yesterday I updated to 1.20.0 software and today when running a file that worked on the previous ver. I had an unexpected Z movement; it was not in the file I created. The Z moved the table down approx. 25mm, I didn’t notice until the cut was completed, has anyone else experienced this?

I have not seen another instance of this. I’m attempting to gather more specifics.

The Boss 3655 was available in different series using different controllers, The LS series use a Ruida Controller. The HP series uses an AWC / Trocen controller. I’d like to confirm which controller you have and which operating system LightBurn 1.2.00 is running in.

A screen capture of the whole LightBurn interface may inform us further.

This may be worth review:

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