There is no way that can happen unless someone changes something. You will have to explain more about your setup. Things do not randomly switch tables. Show screenshots of it before and after, videos, anything to help us understand your issue. SambaPOS is used in thousands of restaurants and not once has something just randomly switched tables without a user interacting with it or someone configuring it wrong.
We can help you but we need to see screenshots and or understand what you have changed in the default setup.
PS. Did you personally see this happen? There is absolutely NO way an employee did not move a table?
I would guess most likely is the staff are clicking change table thinking that’s how to go between tickets but is just that, change the table (of existing ticket). Ticket should be closed then the other table selected.
Hes been using it for years and apparently knows how to use it and isn’t clicking change table (This is the first thing I thought he was doing) He says hes never had an issue before.