CodeLens messes up page scrolling via cursorPageUp / cursorPageDown

IMHO, normally page scrolling should act like this: When you press PageDown and it actually scrolls the window, the new top line of the window is the old bottom line and vice versa for PageUp. This works great when CodeLens is disabled. But when CodeLens is enabled, it seems to be miscalculating what the "old bottom line" is (like it's pretending CodeLens isn't there) and scrolls several lines too far on PageDown, and not far enough on PageUp. Repro (with all extensions disabled): 1. Ensure line numbers are on for easy verification. 2. Ensure PageUp keybinding is to "cursorPageUp" and PageDown is to "cursorPageDown". 3. Enable CodeLens. 4. Open a large Typescript file full of CodeLens references. Scroll to a place where inline references are visible. 5. Observe bottom visible line number. 6. Press PageDown. Observe top line many lines after previous bottom line. 7. Press PageUp. Observe bottom line many lines after previous top line. If this repro doesn't work, I am happy to share my settings file. I'm open to the idea that there is another factor, because the behavior seems so bizarre to me that I can't believe nobody else has reported it (or that my searches were faulty!). Additional data: 1. Curiously, this does NOT seem to happen with scrollPageDown/scrollPageUp actions.