I believe I've found a way to reliably reproduce this bug (although it seems that there is already a fix on the way, which is great!).
I've had Gnome Do begin consuming the CPU numerous times with seemingly unrelated triggers. However, one thing consistently triggers it: using the mouse to select text in Gedit. This is with v.2.22.3 of Gedit.
I believe I've found a way to reliably reproduce this bug (although it seems that there is already a fix on the way, which is great!).
I've had Gnome Do begin consuming the CPU numerous times with seemingly unrelated triggers. However, one thing consistently triggers it: using the mouse to select text in Gedit. This is with v.2.22.3 of Gedit.