Any updates on the status of this issue? The offline problem started with me this week, my Yeelight Ceiling lamp seems offline, even when turned on by remote. All my other Yeelight products work fine (bulbs, desk lamp, big ceiling light 650). The Yeelight app confirms that all firmware is up to date, so the fix mentioned before should have been implemented now, I guesss… Any other users who got this problem recently? And users who experienced this earlier, has it been fixed for you?
After a 5x power on/off reset and pairing it again with tge Yeelight app, it works again. Firmware has not been changed, it was 1.5.5_0180 already. Looks like my issue was not firmware, but network/server related.