I published a CC library from an XD file with a lot of colors, character styles and components. The overview on assets.adobe.com/libraries tells me that the library size is 84mb. I'm not able to copy this library to get an exact duplicate of it. With smaller libaries with only few assets it's working perfectly fine. The copy/copies appear instantly.
assets.adobe.com/libraries tells me that the duplicate process was successful and the new library might not show up immediately. But in fact it doesn’t appear at all – the storage size of CC account decreased though.
I also checked the libraries panel in XD. The copied library does not show up.
I'm not sure if it's relevant: Working with XD 49.0.12 on Mac OS Monterey with MacBook Pro 13" Mid 2019 and a Mac Mini M1 from Late 2020. Other Adobe users were able to reproduce the observed behavior.