Preview does not work often times when generating, this morning I've tested it and 3 times the song generation completed before I could listen. (3/4) while the 4th one of the songs played, beginning about 30s before completion
OS: Fedora 43 / Plasma 6
Browser: Google-chrome (commercial)
The songs do one of two things,
1: for the first 0-45 seconds they often do not modify the current timeline on the plater when clicking, eg. if I was listening to a song up to 0:43 seconds and then click play on the preview during generation timeline remains at 0:43, clicking between the two generations will do the same, clikcing on a song that is completed will behave as expected and play the song beginning at 0:00 --- note: clicking back to the song that did play and was at 0:43 (or whatever time) that is displayed on the player properly reverts to zero, showing the timeline of the player is not hooked still to the original song
2: after some time (though not always) it will revert the timeline to 0:00 but will not play. Occasionally after this occurs, it will play while still generated, sometimes it will not. Note: if one finishes generation it will immediately work, if the second song is still generated it remains unable to preview.
Addendum: It seems to be clearing up, may be early morning server dynamics, users starting to use more compute and its cranking up new machines to handle it. Still some lag, but takes appx. 20-30s before the preview begins. May not be a bug, just a server dynamics and cold start issue due to heavy usage surge early morning