I have a custom .spcolor file which changes the colour of the suite bar, amongst other things. Yesterday, it worked fine, everything was good.
I loaded up SharePoint this morning (no changes made) and only the suite bar has reverted to the standard O365 theme, the rest is fine. I've gotten used to Microsoft doing strange things and seemingly the ghost in the machine running rampant at times but I've reapplied the theme (change the look etc..) and still nothing. Ideas?