Stepping on straight cuts

Looking for help on what could be causing this…
Set up is plasma route table
Victor plasma cutter
Using sheetcam and mach 3
Problem used to be minor and now seems to be getting worse and more frequent. Have tested with torch off, still does the same thing. Have also checked all gears and rollers, everything appears to be good and tight. I also know it isn’t stray nodes as it does this same thing with every file.