https://github.com/kmacedovarela/heatmap-issue-reproducer Zoom In /Out and see that the sequence flow tail is not placed on the mouse pointer hence not connecting properly Issue is due to Zoom In /Out and the sequence flow not placed correctly on the mouse pointer Actual result When zooming in and out the sequence flow/nodes are not placed correctly following the mouse pointer Expected result When zooming in and out the sequence flow end/node should be placed correctly following the mouse pointer hence giving the user a correct measure of where to place it on the visible canvas