I have the same issue almost except the usb light turning off when i start to use the ur22mkII through ipad camera adapter …I just realized one more thing. If i put the ipad charger (with charging icon) through the camera adapter and i connect the UR22mkII (all are original new one, ipad9.7 with 12.1.1 OS and 1.0.5 usb camera adapter firmware and with the last UR22mkII firmware version 1.04) the usb audio interface seems to be working. (USB light is on) After i start to play something with garageband through the UR22mkII then suddenly the light goes off and also the ipad charging in the same time. After it i unplugged the ur22mkII usb cable from the adapter but my ipad wasnt charging so i unplugged all the adapter and charger from the ipad. Then i put in again only the charger to the ipad but it still not charged the device. So i take off the charger from the connector and take in again and my ipad start to charging. So something weird is happening with the charging. I try to switch the power source to 5v dc on the UR22 but i cant get the usb light on. So maybe if somebody can solve to get the usb light works with 5v dc power source then this problem could be solved.
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