bug about Audio functions

[ghost]

I use this program as main tool for language learning with epub3 files. (excellent work :) So, I occasionally stop audio for copying text into clipboard, pause audio and seek audio next to next line or previous line. I encountered numerous of bugs.

• When AudioStop activated, it seems AudioNext and AudioPrevious button work randomly seeking to anywhere they want.
• AudioNext and AudioPrevious activate autoplay even I pause the audio.
• when I swap windows with alt+tab sometimes the audio position is seeking randomly.
• I need to carefully click on thorium free space on the screen after using other programs to avoid accidentally playing unwanted audio lines.
• left click, right click and text selection appear the same behavior, play the audio line. I can't copy text while the audio is running.