My warlock has the Tomb of Levistus invocation and it correctly shows up in the "limited use" section along with class abilities like Misty Escape and Mystic Arcanum. But, weirdly, unlike every other item in this section, there's no "USE" button to click to indicate when it's been used. Weirder still, if I click on the "+" symbol to open it, it doesn't tell me what Tomb of Levistus is, again unlike every other item in this list. Instead, it lists all of my warlock invocations. This has to be a bug - there's no way it's supposed to look like this.
My warlock has the Tomb of Levistus invocation and it correctly shows up in the "limited use" section along with class abilities like Misty Escape and Mystic Arcanum. But, weirdly, unlike every other item in this section, there's no "USE" button to click to indicate when it's been used. Weirder still, if I click on the "+" symbol to open it, it doesn't tell me what Tomb of Levistus is, again unlike every other item in this list. Instead, it lists all of my warlock invocations. This has to be a bug - there's no way it's supposed to look like this.
Yes, the current character sheet hates those invocations that have a limited use and are not related to a spell. This will be fixed in the revamp.