to reproduce:
- have a decon planner in hand slot
- be on map view
- click on a ping in chat
--> decon the whole map when you release mouse1
this webm shows what happens
(mouse1-release not shown because of recording problems

like, i would expect to not decon the whole map when clicking on a ping! (or, hell, at least ask for confirmation)
EDIT:
re-recorded it and this time i release mouse1 as soon as i click it.