Ripple deleting only video (training instructions not working for me)

[Oubliette]

I'm following the first Introduction to Editing tutorial from the DaVinci website.

At ~38 minutes, it tells me to ripple delete video without deleting the linked audio:

1. Select the clip
2. Use the ALT key to select just the video, without selecting the linked audio
3. Use SHIFT-BACKSPACE (PC) to "Ripple Delete".

I am...

1. Selecting the clip
2. Using the ALT key to select just the video, without selecting the linked audio



3. Pressing SHIFT-BACKSPACE to Ripple Delete (the video says Shift-Del, but on the PC it seems like Shift-Backspace)



This deletes both the video, AND audio.

I've also tried:

• Ripple Delete via the right-click context menu
• Shift-DEL (does nothing)
• DEL (deletes both)
• Just BACKSPACE (deletes the video, does not ripple)
• "Ripple Cut" (same issue; both with keyboard shortcut and context menu)
• Locking the audio track (this deletes only the video, but desynchs the audio from subsequent clips)
• Toggling "Disable Sync Lock"
• Using the opposite methodology (turning off linking for the full track, then ripple-deleting the video; this still deletes both)
• Closing and re-opening Davinci Resolve and trying the above again

I feel stupid asking, but how does ripple delete work for just video?