Unfortunately it seems that this shortcut doesn’t work in any web-based components. Even in a plain google search box.
Depending on your Android version/manufacturer/ROM you may have the option to change the hotkey to something else (or get a choice in three) like shift+alt, but I tried that and it doesn’t work either.
It doesn’t seem like there’s anything we can do to fix this. Most likely the fix will either have to come from Android or your keyboard app.