A simple play order plugin for Quod Libet (https://quodlibet.readthedocs.org/en/latest/).
Just put into your Quod Libet plugins/ directory. This can be located, for example, at: ~/.quodlibet/plugins.
Then enable the plugin in Quod Libet (from the Plugins list), then select "Better Track Repeat" as the play order via the bottom left of the player window.