We're using this bug specifically to track only the fb issue. I use the other sites that you mentioned that you also see this bug on, but I've only ever seen the problem on fb. So we'll use this bug to track the one reproducible issue. From your description of how you reproduce on twitter it seems to be much more involved, so seems likely to be the same problem. It's best to keep bugs focused on one specific issue.
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We're using this bug specifically to track only the fb issue. I use the other sites that you mentioned that you also see this bug on, but I've only ever seen the problem on fb. So we'll use this bug to track the one reproducible issue. From your description of how you reproduce on twitter it seems to be much more involved, so seems unlikely to be the same problem. It's best to keep bugs focused on one specific issue.