[Bug] File autocomplete suggestions disappear when navigating subdirectories with @ syntax

Question

**Bug Description**
"I cannot see autocomplete or suggestions for file referencing when typing '@'. typing '@' doesn't show anything and then typing another character after that, like 'a', shows the list of agents and then the list of top-level files and directories. However, when I tried to keep typing to go into one of the subdirectories, the autocomplete or suggestions just vanish. just This behavior is useless and different from earlier versions of claude code. This makes referencing files u