I am having some issues with the Amazon Echo Control Binding.
This may have been triggered by me changing my Amazon account password - or it may have been caused by clearing the OH3 cache - or perhaps something totally unrelated.
Found the issue. It seems that some time ago when having issues, I installed a version of this binding in the add-ons folder. When OH updated to the latest version, it seems to have turned on the standard version - conflicting with the add-on folder version (perhaps only after I cleared the cache??).
Removing the file from add-ons solved the problem.