I've sent bug report, but want to see if anyone else has this issue.

1. Create a LWCAD Box
2. Seelct the LWCard Round corenr TR tool and a apply a value as required.

Result is the corner polygons disappear.

Applied the same tooll to a LW BOX and the results are worse

I have found a similar problem. There is no fillet between the faces and alsothere is no consistency as to which faces are modified - it seems to be random whether 1, 2 or 3 faces are modified . It works well on rectangles and polygons but not on boxes.

I have this on my current object, and have seen it numerous times.

My LWCAD versions is 2018.31 but as soon as i run a 'round' on the corners, the rest of the curves disappear.

It also seems very very unstable.
The object is very simple, so will bug report it I guess.

New round tools for surface edges and curve corners are already finished.

new round tools are included in LWCAD 2018.5 which is currently in beta phase.

If you'll have any issues with new round tools, please let me know back.