A classic problem - not the inversion but what we are talking about
An inverted kite is a kite that has turned inside out, flying with the bottom side up.
A tumbled or rolled kite, or "line inversion", is a kite that flies normally but the front and rear lines are twisted/crossed.
In below thread, as well as every other thread I've seen about this, including this current thread, there are confusion and people answer on two very different things:
viewtopic.php?f=1&t=2400257
If it is just a line inversion, my answer would be NO, get ashore and get it sorted.
You can ride just fine with lines inverted, it just looks wrong which mentally gets one to dislike it... Wear on lines are slightly higher though, but no big deal.
Of course it CAN be untwisted on the water with the kite down, but it is difficult, it is risky for you and others, and you might as well get a LOT more unequal line twists this way, as it is quite difficult to get it correctly through the "V" - and if a high V it can be a life threatening risk as you can get line tangles on yourself quite easy
If it is an inverted kite, usually happens if underinflated or extremely powered while flying kite depowered, fly it down in the water and see if it rightens itself now.
Maybe you need to pull a rearline to get itself to flag to normal outside out.
Peter