<!-- See our full bug reporting guidelines at https://inkscape.org/contribute/report-bugs/ Writing a good bug report will ensure we'll be able to help efficiently. 🙂 --> #### Steps to reproduce: <!-- Describe what you did (step-by-step) so we can reproduce: --> - open Inkscape - use the bezier pen, set to "bspline", to draw a trefoil knot (without crossings) - select the path and create new path effect "knot" - use the crossing switcher to change over/under crossings #### What happened? - Clicking the crossing changer once does not change the over/under crossing. - Clicking twice does remove the crossing however. #### What should have happened? - The crossing should have changed on the first click. #### Inkscape Version and Operating System: - Inkscape Version: ... 0rc1 09960d6 - Operating System: ... Mac OS X - Operating System version: ... 10.15.4 <!-- Example file:'t Attach a sample file (or files) highlighting the issue, if appropriate. --> <!-- ❤️ Thank you for filling in a new bug report, we appreciate the help! ❤️ Please be patient while we try to find the time to look into your issue. Remember that Inkscape is developed by volunteers in their spare time, we'll try our best to respond to all reports. -->