Yes I know many tricks how to deal with inperfection of this piece of software, thanks Working with flash for 20 years But can I suggest here easy solutions for developers?
Adding a layer is a workaround. Did you try click and holding the white arrows? If you think it slowly goes to the first frame it does not. There is a built-in behavior in there to jump to the first frame.
Just lump to beginning! Example- you got sky movie clip and its long because of a slowly moving clouds You wanna get to the first frame. Not you have to SCROLL WITH A SLIDER to the beginning. Its so ridiculous. I guess to add this button to the code takes less time then writing this comment
If you click and hold on the arrows with the mouse it will rewind and fast-forward the timeline as well as use the keyboard shortcuts period/arrow forward key on the keyboard to fast-forward and the comma/arrow back key on the keyboard to rewind. Make sure the timeline is selected.