Tiles compositor is interactive (keeps refreshing the viewer) while you drag a node value. However if you cancel this tweak with Esc it doesn't refresh back to normal
Can you explain in more detail?
Tried it with a simple setup:
RenderLayer -> Mix -> Composite/Viewer. I changed the "Fac" of the Mix node, but canceled the tweak via ESC. Composite and Viewer refreshed back to normal.
Zanqdo, you should really provide example blend files and more infos. The bug report guidelines are meant for everyone ;)
OK apparently it has to do with the render size, some race condition or something. I have uploaded a simple file at 1080p resolution
Change the blur node's size to 0 and while still holding down the mouse press Esc