[Bug] Terminal flickering occurs with sub-agents and large text input

Bug Description
Terminal Twitching still happens every time when using sub-agents. Also sometimes after pasting in large texts.

Environment Info

• Platform: win32
• Terminal: vscode
• Version: 2.0.72
• Feedback ID:

Errors

[{"error":"Error\n    at ih (B:/~BUN/root/claude.exe:58:1144)\n    at <anonymous> (B:/~BUN/root/claude.exe:59:10097)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (B:/~BUN/root/claude.exe:61:2149)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-17T23:35:16.609Z"},{"error":"Error\n    at ih (B:/~BUN/root/claude.exe:58:1144)\n    at <anonymous> (B:/~BUN/root/claude.exe:59:10097)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (B:/~BUN/root/claude.exe:61:2149)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-17T23:35:17.417Z"},{"error":"Error\n    at ih (B:/~BUN/root/claude.exe:58:1144)\n    at <anonymous> (B:/~BUN/root/claude.exe:59:10097)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (B:/~BUN/root/claude.exe:61:2149)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-17T23:35:46.242Z"}]