Astra Stereo S U3 cannot be accessed without sudo

We purchased two Astra Stereo S U3 for development purposes (Linux, C-API) a couple months back.
Today they seem to have stopped working suddenly (my usb controller seems to still work with other devices).

The error as I launch an OpenNI application is:

After initialization:

SimpleViewer: Device open failed:
Could not open "2bc5/0614@1/14": The Xiron USB subsystem failed to initialize!

The error as I launch a sample from AstraSDK is:

2020-12-24 12:05:27,792 ERROR [] failed to open device: Could not open "2bc5/0614@1/14": Failed to open the USB device!

Our code and the above sample applications used to work until moments before. Support contacted via website.
The color camera component is still accessible and working. We completely lose the depth stream.

UPDATE: It turns out the depth stream can be still opened with sudo.

Any ideas?

It is unclear to me why that happens, but it seems like the following permissions get messed up.
If you can access them with sudo then it is a permission problem:

ls -l /dev/bus/usb/00*
ls -l /dev/bus/usb/001/00*

Fix along these lines:

sudo chmod o+rw  /dev/bus/usb/00*
sudo chmod a+rw  /dev/bus/usb/001/00*