Layer Problem

I have a problem in my storyline file, i have placed my next button in the layer and have given a trigger to appear after 3 sec, when I preview my file it works well when it start from the beginning, but in between if I go back to previous slide and continue the module, the next button layer is not working properly,(it doesn't appear) this happens only with me, if I share the same file with my friend and if the publish or preview it, it is working well, I have uninstalled and re installed the storyline then too it is not working