Same problem for me too (S5 Pro Bundle).
When the reel (Ultmaker CPE) is empty the material station remains paused and does not load the material (after 24 hours of printing, 50% of job).
Latest firmware uploaded.
I'd say there must be a bug.
Any news for you?
Edit:
Following this procedure i can restart my print. (crossing fingers)
..but waiting for a firmware patch!
Edit2:
after few minutes ... new issue with other extruder (breakaway spool)
2 errors: ER65 and ER72.
Disabled "Flow sensor" and restart the print!
Stay tuned for news!!