Cutting does not respect the right angle

[parsec (FerAS)]

Are you talking about this behavior:

Warped Or Disconnected Lines - LightBurn Documentation

If so run the file in the following post

Burn Offset LighutBurn 1.7.03

Given one picture and four words, I think @JimNM has nailed it. This test pattern helps identify mechanical problems: GrundTest.lbrn2 Scale it to fit the platform and run it as fast as it will go in Line mode with optimizations turned off and power set to mark a sheet of cardboard. Any differences from the design will be informative. Upload good photos of the result so we can look over your shoulder.

then post here the output.