This has been the case recently. The wing has a lacing, but the handle and lever are much above it (the lacing divides the door not in half, but about 1/3 from the bottom, and the handle and lever are in the middle). In addition, the lever is not pressed by any screwed-on element, but by the frame itself. You can see that the lever is pressed when closing the leaf, hitting the frame, besides, I thought that maybe for some reason the frame started to press the lever too weakly, but with the leaf open it is enough to press the lever very slightly to make the tilt mechanism work. I would like to add that the problem is not that something restricts the movement of the handle to some extent, but completely blocks it as if the lever was not pressed. Is something else, apart from the lever, responsible for "triggering" the tilt function ???