Show Clip Keyframes >time remapping >speed menu item has disappeared!

[trevor28336019sh4c]

I have been working on a bunch of videos involving speed remapping when suddenly, in the middle of an editing session involving the same project file, the Show Clip Keyframes > Time Remapping > Speed option has disappeared. Normally it's at the bottom of the list, now it's gone. It looks like whatever menu positioning/resizing algorithm is broken. I have the "Show FX Badges" option enabled. I try to hover my mouse at the bottom of the list to make it scroll further down but that doesn't work. Here is a screenshot:

This has completely halted my work on this project. HELP technical support team!