Bug when adding point to existing path

I use the pen tool to add points to existing paths, most of the times for adding extremes. Sometimes I click and drag by mistake (I’m using a Wacom tablet), and when that happens the last off-curve point of the path is modified. Here’s a quick screen cast: http://drp.mk/i/0QZfkv6K8v

I’ll fix this.

Sorry to nag you, but this still happens on 2.4.x. Any chance to fix?