Being able to play an MP3 and read a PDF on an Android device

So the behaviour using the default (the one Dropbox uses on Android 14) MP3 player and PDF is that it stops playing the MP3 as soon as you switch to view the PDF. It's the same behaviour if you use Adobe acrobat reader instead of the OOTB config. Maybe it's Android and that it's not a true multi tasking operating system limitation, but it's a very degraded Dropbox user experience OOTB compared to windows 10. I'll try VLC player and surf the wider non dropbox forums for further advice.