Discovered the issue was a missing closing bracket, not an issue with hovercard.
Edit 17 April 2018: rediscovered that there is in fact an issue with the displaying of brackets containing IPA. Detailed below.
As I understand, it is hovercard's policy to remove bracketed content in link previews (which is a good thing). Well, it is failing to do this when the IPA template is used within brackets. It seems to end the omission at the end of the IPA template rather than at the closed brackets. As you can see in the example below, it correctly omits the next set of bracketed content after the first failed omission.
Example: page – link preview
Update 17 April 2018: I have discovered that there is in fact a problem with brackets containing IPA being displayed in link previews. The problem seems to follow the exact same logic as described in my original post above.
Example: page – link preview
@SUM1 I wanted to let you know I saw this and have reported it to the project manager. We're looking into it. I'll let you know what I find out.
Hi @SUM1 - thanks for reporting this! The issue you mentioned was actually happening due to a parenthetical that needed closing - note that the first parenthetical in the article right before the IPA was never closed. This has since been fixed now in the page and the preview no longer shows IPA. That said, we are aware that more edge cases with parentheticals might occur - please let us know if you've noticed any other issues.
Hovercard is displaying brackets and other punctuation if their are multiple IPA templates used. Examples [[w:Louisiana]], [[w:Scythian languages]], and [[w:Scythians]]
I've opened https://phabricator.wikimedia.org/T198264
Note https://www.mediawiki.org/wiki/Extension:Popups?useskin=vector#How_can_I_remove_content_from_a_page_preview does provide an option for you to workaround this issue in the meantime.
