My text adds adds makes my video back up a few frames back

Every time i add on a text layer it seems that the video (which is in another layer) skips a few frames back, no idea how this happened but i seems to accumulate if i add several text layers next to eachother, then when the text layer is done it skips back to where the video is supposed to be, if i add enough i can clearly see a video/audio synchronicity fail.

if i do not have any text files then the skip does not happen.

The pictures addes show that the only thing moved is the text layer, but also the video frame has been changed.