[CrackBerry Question]

Using Instagram 7.12 (but had the same issue with older versions) - Z10.
Videos look smooth during editing and tagging but once they're uploaded they become choppy (loss of fps).
Tried lowering resolution, changing codes, using SD instead of device storage, ... nothing helps.
Some videos go from the original 25 fps to something like 5 fps.
The loss of fps happens in the final step of the upload.
Is there any known solution?