Interruption bug?

On numerous occasions there are time when I am casting spells I sometimes get interrupted for no reason.

The mob is right in front of me. I am not moving and it is not moving, but for some reason I get interrupted. I don't have paralyze or any negative ailment when I get this problem.

The only way I can describe it, is like trying to cast raise on a dead person who is disconnecting. You cast and the first half second it lets you start casting then stops and you get interruption message.

Is this a bug?

Something similar happens for me "often" when I cast Fire III - Ice III - Ice III or
Ice III - Fire III - Fire III or something like that, dont know for sure.
Sometimes the 3rd cast will have 50% casttime (like the 2nd), sometimes the casttime is 100%
and sometimes the cast gets interrupt.

(maybe the client cant decide if the Casttime is 50% or 100% ? )

Thank you Jinrya-Geki for your post outlining the trouble you are having with a possible interruption bug.

In order for me to submit your report, I will need some more information. You can go Here and you can find templates for Windows and PS3 that represent the kind of details we need. Once you can provide such information we can move forward and resolve this issue. For now I am going to move this thread into Insufficient Information. You will not be able to reply, so once you have gathered the requested data please create a new bug report thread.