[BUG] Suggestions for linked files fail in dev containers in intellij

Environment

• Platform (select one):
• [X] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.24
• Operating System: maxOS 15.5
• Terminal: Claude Code terminal in remote IntelliJ

Bug Description

I am running claude code in a dev container for intelliJ. I am experiencing issues when it comes to file references (like @MyFile.java). The expected behavior is a list of suggestions. This works well in a native intellij environment. But in my dev container setup, it fails almost all the time: The list of suggestions appears very late or not at all. It is also incomplete.

Steps to Reproduce

1. Start any dev container in intellij
2. Try to reference a file using @ in claude code in intelliJ

Expected Behavior

Should work like in a native intellij environment.

Actual Behavior

The list of file candidates appears late or not at all.
The console states "IDE not connected" sometimes (might be related)

Additional Context