Rubick arcana does no display with the latest vulkan, 1.9.2. - it lets you select it from the menu - but doesn't show- tried to demo the hero, still not displaying, but it is equipped.
I can see it when i watch other people's games, in vulkan,

I bought the rubick arcana inside the game interface?
I restarted dota hoping maybe it must just sync with my account

When equipping it, it shows in the window, what you are selecting, after selecting, it disappears, ie. no cloak is visible any longer.... PLease help .