Created attachment 104628 [details]
Shaped gradient bug

Shaped gradient gets messy if used on discontinuous selection and/or more complex shapes. Seems like it recognizes some places as selcted or as edge of the canvas (though they are not).
I attached a file on which you can see that the gradent is placed around the coastlines on sea (where intended), but also creates two vertical lines where there was no selection at all. This is one example. Sometimes i get different (usually straight line-shaped) gradients in different places though there was no selection there.

Checking the REVERSE options usually makes the gradient as intended, but not always.