Background Process Not Detaching During npm Run Command

Bug Description
Move to background when I run the npm run. It is a long-running process, and it's my dev server, but the "Move to background" option is not showing for me.

Environment Info

• Platform: darwin
• Terminal: cursor
• Version: 1.0.77
• Feedback ID:

Errors

[{"error":"Error\n    at hU (/$bunfs/root/claude:493:1076)\n    at V1 (/$bunfs/root/claude:494:9957)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:862:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:496:2098)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-08-13T20:59:04.525Z"}]