Posted by ravas on May 24, 2016; 5:27pm
URL: https://forum.librecad.org/Troublesome-little-red-circle-with-cross-after-a-mistake-tp5713755p5713756.html

That's the relative zero indicator.
If you aren't using it, then you could use the 'lock relative zero' action on the snap toolbar.

http://wiki.librecad.org/index.php/Relative_Zero