Any selection of 1 doesn't work

[Rallaster]

Thrumming and Fateseal do not work if there is only 1 selection to be made. The window that pops up does not recognize that a selection has been made if there is only 1 selection to make. If there is more than 1 selection to make, you can make that selection, but only down to 1. Once you are down to 1 selection to make, it does not allow the selection to happen.

[xenohedron]

As a workaround until @JayDi85 fixes this often-reported regression, try disabling auto-choose targets (in preferences)