Steps to Reproduce: 1. Select Assistant Tool, set its Tool Options to Vanishing Point 2. Create 1 vanishing point assistant 3. Immediately try to drag one of its anchor points somewhere Expected Result: Anchor point gets dragged somewhere else. Actual Result: New vanishing point is created on top of the anchor point you meant to drag. Workaround: Only the last created VP assistant cannot be manipulated, other VP assistants can still be manipulated, so create the VPs you need first and then create one extra.
Git commit 4659a8bb9a2708e7986e7fe231c36981506abadd by Scott Petrovic. Committed on 06/01/2018 at 17:33. Pushed by scottpetrovic into branch 'master'. M +4 -0 plugins/assistants/Assistants/kis_assistant_tool.cc https://commits.kde.org/krita/4659a8bb9a2708e7986e7fe231c36981506abadd
this should be fixed if you get latest...or wait until the next nightly build happens.