When you use siege weapon in WvW your camera is flipped to same direction the siege weapon is pointing. Camera zoom is also changed.
This is annoying and often unwanted behaviour. It is most notable when you are in a hurry refreshing siege in a keep or trying to fire a quick ballista bolt at incoming zerg.
Suggestion
Do not change camera angle/zoom/position when using siege weapons.
Sulkshine – Mesmer
This won’t hurt [Much]
Ring of Fire