Having this too. First sign is crackling audio which then ceases altogether, then I notice the swirly loading icon in bottom right stops and then the window freezes over completely with you usual windows 'not responding' pop-up if I try to click anything.
Not sure if its related entirely, but the first sign also happens when I'm flying during bad weather conditions such as rain or fog. I have sent an in-game help request to see if theres anything I can switch off, altho these instances do usually resolve itself after 4-5 seconds unlike the teleport issue. While I do accept that some PC are not as well adapted as other, my PC scored very high on the benchmark on DX11 so was not expecting to encounter any issues.

-=-=-=-=-=-=- FFXIV Information -=-=-=-=-=-=-

MyDocument E:\Reebie\Documents
FINAL FANTASY XIV - A Realm Reborn C:\Program Files (x86)\SquareEnix
FINAL FANTASY XIV - A Realm Reborn Language 1 Region 3
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-=-=-=-=-=-=- System Information -=-=-=-=-=-=-

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SYSTEM_SOUND_DRIVER_DATE 24/05/2011 13:34:04
SYSTEM_SOUND Realtek Digital Output (Realtek High Definition Audio)
((Cut for personal/security reasons))