I'm trying to create a new job as a copy of an existing job.
When I enter the name of the job to copy:

• the suggestion list only displays a few (exactly 10) of the available jobs
• the suggestion list does not change to match the typed prefix
• tabbing out of the input box replaces its contents with the first suggestion (which does not match what I typed at all) unless I use the arrows to choose another suggestion

So I can only copy one of the alphabetically first 10 jobs defined in Jenkins and even that is not easy.