Hi,
Just wanted to chime in and say I had the same issue, and the fix was the same- had to enable the ‘port-fast’ feature on our cisco switches.
From my reading of the cisco documentation it looks like its safe to enable this feature on all ports that are patches to ‘endpoint devices’ like PCs, printers etc.
Thanks to the posters in this thread for providing the required info. Nothing worse than finding a thread on the internet describing the exact issue you are having, and the last post is the original poster saying “I solved it” without elaborating what the fix was!