The applications being recorded are arbitrarily complex. The rendering of the iFrame for session replay in Chrome / Edge might look a little different from the rendering in the original browser, which can amount to some pixels offset in the mouse pointer. Also we don't do a very high time resolution so it may happen slightly off in time (but that is sub-second so for a human it should not be discernible).
If there are larger gaps in offset or time, it is a potential bug in the capturing and replay.
