New Keyframes on 'Effect Controls' panel don't carry over the bezier curves of previous keyframes.
Not 100% sure this is a bug, but it seems the behaviour of bezier keyframes has changed. Before Premiere 26.0, if I created a “position” keyframe and applied ease in and out bezier curves, the new keyframes created within that clip would also have ease in and out curves. It doesn’t do that anymore, a new keyframe seems to default to a bezier but not ease in and out. This is problematic as I have presets saved with pre-existing keyframes set to ease in and out, and I apply them to hundreds of clips within a session. Now I have to manually add the ease in and out curves to any new position keyframes within those clips.
Here's a video of the process. You can see me dragging the picture on the program panel to create a new position keyframe. Whilst the mouse cursor is pressed, you can see some sort of ease in and out bezier curve in effect under effect controls. As soon as I release the mouse button, it snaps into a weird and harsh curve. I then have to manually add ease in and out curves to those keyframes. Before version 26.0, bezier curves behaved differently.