Is Ctrl + Alt + V a restricted key combo in 18.04?

Question

Is Ctrl + Alt + V a system-owned or somehow restricted key combination in 18.04?

Original symptom behavior is that paste-formatting combo not working in google sheets.

Then searched the keyboard shortcuts and couldn't find ctrl + alt + v reserved

Then attempted to set it as a combination to a dummy command (clear), and found the settings utility wouldn't allow that combination to be set.

i.e. trying to set ctrl + alt + v there was no response. ctrl + alt + b would set just fine

• shortcuts - no ctrl+alt+v
• test shortcut
• ctrl+alt+v will not set
• ctrl+alt+b will set

System:

• HP 15t laptop
• Dual-boot Windows 10 / Ubuntu 18.04

Many thanks.