P: CS6 -Text Layers re-written from some ancient cache

Hi Guys,

here's the issue.

When editing a text layer with the type tool, without pasting or anything, just entering the editing of the layer, Photoshop somehow pastes some cache'd text. Mind you - this isn't text that would have even been entered during the editing session.

Please take a look at the video of this bug in action.

http://youtu.be/ureQYxlsp6M

So instead of editing, sometimes, the text layer just pastes whatever from the cache.
This exact thing also happens, if you convert the group holding the layers to a Smart Object.

I can't figure out what happens that makes the layer affected or how to circumvent.
The only way I go around this is copying one of the layers that appear unaffected by this cache thing and editing them again, however, it does re-occur at some point after saving.

Please help, this is a really obnoxious bug.

I'm on Photoshop CS6 13.0.4 x64 on OSX 10.8.4 right now, but this has been happening to me consistently for about a year and I've been updating.
In fact I just updated to 13.0.5 x64 and still no cigar.