Line thickness strange corners

Hello,

I just started using Bricscad. On the corners of the polylines or rectangles when the lineweight is ON I can see some strange endings (like the ones in the picture). I think is because the line on the edge is rounded and so the rounded shapes overlap from the intersection of lines.. is there a way I can change/fix this ?
Thank you.
I am testing it from 3 days ago and so far I like it very much ! Good job.