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Hovercards sometimes vanish immediately in Firefox, depending on cursor placement
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Description

In Firefox, sometimes a hovercard will appear and immediately disappear.
It only occurs for hovercards that show above the link.

Cannot reproduce in Chromium.

Ogg movie recording at F2946456 ("Save link as" on the "View file" link, to download and view locally. Local view won't work.)

(Originally reported at https://www.mediawiki.org/wiki/Topic:Ssd8zww9s8bfyc3c)

Event Timeline

Quiddity raised the priority of this task from to Needs Triage.
Quiddity updated the task description. (Show Details)
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Possibly the same bug as T68240: Hovercards: occasional single flicker for cards that overlap with the link (edge-case), but I could reproduce that bug in Chrome. (sadly the old attachment on that task, isn't included, and isn't at old-bugzilla)

I am able to reproduce this quite consistently with some pages and not at all in others. I suspect that hovercards that render in the bottom left quadrant face this problem the most.

On Firefox, go to the Celtic page, scroll down to Other uses but only enough to keep it in the bottom half, hover over Celtic music, try to move the mouse to the Hovercard itself. I have never been able to successfully keep the card open with my mouse on it.

There are a few others on that page, but I haven't been able to find a pattern yet.

Jdlrobson triaged this task as Medium priority.Nov 30 2015, 9:32 PM
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@Prtksxna can you still replicate this? I cannot...

@Jdlrobson I am not able to reproduce it on 45.0a2 or 43.0.1 with those instructions either.

I cannot reproduce this bug any more. Currently using FF47.0

bmansurov subscribed.

I cannot either. A lot has changed in the hovercards codebase since the bug was reported. Closing as resolved.