In the new version of polaris the tooltip arrow has disappeared.

Please return it to its place.
Removing the arrow was a UX decision. Heres the commit if you were curious.
The arrow was removed purposefully, as it was buggy when popovers were aligned left or right and was also causing issues in the autocomplete component.
@chloerice I talk about tooltip, not popover. It's a bad decision, it degrade the intuitiveness of the interface. I am disappointed.
@AndrewMusgrave tooltip is a separate component. Why did you remove the arrow from it?
https://polaris.shopify.com/components/overlays/tooltip
We used the tooltips for the setup wizard and they were a great solution because exactly indicate where to click the user. Now the clarity of the interface has deteriorated. At first you broke the activity of the tooltip - it stopped responding to the active state, now you remove the arrow. With each update a new breakdown :( Where did you even see tooltips without arrows?
@kadsystems, we intentionally removed the pointer, or caret from Popover and Tooltip for the following reasons, in addition to those mentioned by @chloerice and @AndrewMusgrave:
We used the tooltips for the setup wizard and they were a great solution because exactly indicate where to click the user
Using this component as a wizard or indicator of where to click is not the intended use-case of this component, and not one we will optimize for. The Tooltip component, as described in the docs you linked, is intended to provide additional context on text content, like a link or an icon, and is meant to be revealed when an action is taken by a merchant.
If this is still not acceptable, we invite you to fork the Tooltip component in your project and add the caret back in, or explore using another library.
It's a bad decision, it degrade the intuitiveness of the interface. I am disappointed.
With each update a new breakdown
Finally, we ask that you please avoid non-constructive criticism, maintain a respectful tone when commenting on this repository, and adhere to the standards in our code of conduct.