Thanks. I think I have fixed this bug: If you had two zPEQ editors open (showing the same plugin instance) and one of them were showing the phase, then enabling phase display in the second editor would not update the phase curve until you made an edit or resized the editor. This also happened in previous Podium releases, if you had the track panel editor and the plugin editor window open simultaneously.
Let me know if you still find problems with the phase curve, after the next 2.24 beta release.