Typing /function then space closes the internal server

When updating a world to this snapshot and typing /function followed by a space the internal server closes. This does not seem to happen in worlds with a small amount of functions, only worlds that have datapacks with many many functions. This does not happen in 1.20.4

Steps to reproduce

1. Load a world with a large amount of datapack functions
2. Type /function followed by a space

Expected Outcome

• Function namespace previews appear
• Takes me back to single player worlds instead of server list