@valdiusryb Do you have any mods ? If so disable them. If that doesn't work delete your matchsettings.json file. Check the FAQ for more info https://trac.wildfiregames.com/wiki/FAQ
The game supports running out of the box with the -writableRoot flag. What you can do is backup your old 0 A.D. install, then install the new one. This way you can have both coexisting.
Hey @Toranks could you give a little more information about your system? See wiki:ReportingErrors and wiki:GameDataPaths
It could be a SDL bug.
EDIT: Test on Windows with no issue.
Mmmh there is no reason they wouldn't play, but maybe you always get attacked before they have time to play, so it switches to combat music then back to normal music starting from the first track