[Bug] Anthropic API Error: Usage limit reached despite /usage showing available quota

Bug Description
"I consistently get <usage limit reached> message this weekend, despite the fact that I never hit the limits according to /usage. Please help investigate the cause (or give better feedback, that does not look like a lie.)

Environment Info

• Platform: linux
• Terminal: gnome-terminal
• Version: 2.0.50
• Feedback ID: ec8b9b7f-80a9-4bff-aaad-4821a7865b22

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /home/m/.local/share/claude/versions/2.0.50 (expected in multi-process scenarios)\n    at BCD (/$bunfs/root/claude:2638:1622)\n    at hXA (/$bunfs/root/claude:2638:1300)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-29T13:17:46.588Z"},{"error":"Error: EISDIR: illegal operation on a directory, read\n    at readFileSync (unknown)\n    at readFileSync (/$bunfs/root/claude:12:370)\n    at dnI (/$bunfs/root/claude:4226:16942)\n    at call (/$bunfs/root/claude:1460:912)\n    at call (/$bunfs/root/claude:1456:5768)\n    at go1 (/$bunfs/root/claude:2146:26145)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-29T16:35:26.053Z"},{"error":"Error: 429 {\"type\":\"error\",\"error\":{\"type\":\"rate_limit_error\",\"message\":\"This request would exceed your account's rate limit. Please try again later.\"},\"request_id\":\"req_011CVcf2va8NFFb1GH5QgwZv\"}\n    at generate (/$bunfs/root/claude:350:36697)\n    at makeRequest (/$bunfs/root/claude:1256:5434)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-29T18:30:22.386Z"},{"error":"Error: 429 {\"type\":\"error\",\"error\":{\"type\":\"rate_limit_error\",\"message\":\"This request would exceed your account's rate limit. Please try again later.\"},\"request_id\":\"req_011CVcf4j49Ace5d3eHWVRyJ\"}\n    at generate (/$bunfs/root/claude:350:36697)\n    at makeRequest (/$bunfs/root/claude:1256:5434)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-29T18:30:46.742Z"},{"error":"Error: 429 {\"type\":\"error\",\"error\":{\"type\":\"rate_limit_error\",\"message\":\"This request would exceed your account's rate limit. Please try again later.\"},\"request_id\":\"req_011CVcf7cdGoKq2ytNtbWbAf\"}\n    at generate (/$bunfs/root/claude:350:36697)\n    at makeRequest (/$bunfs/root/claude:1256:5434)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-29T18:31:26.185Z"},{"error":"Error: 429 {\"type\":\"error\",\"error\":{\"type\":\"rate_limit_error\",\"message\":\"This request would exceed your account's rate limit. Please try again later.\"},\"request_id\":\"req_011CVckBnKd7xjtK6Sh71yWX\"}\n    at generate (/$bunfs/root/claude:350:36697)\n    at makeRequest (/$bunfs/root/claude:1256:5434)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-29T19:37:56.655Z"},{"error":"Error: 429 {\"type\":\"error\",\"error\":{\"type\":\"rate_limit_error\",\"message\":\"This request would exceed your account's rate limit. Please try again later.\"},\"request_id\":\"req_011CVckD69xToUr2ce9keDpD\"}\n    at generate (/$bunfs/root/claude:350:36697)\n    at makeRequest (/$bunfs/root/claude:1256:5434)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-11-29T19:38:14.293Z"}]

I am unsure whether this is related to frequent hangs of Claude Code IDE, when it becomes unresponsive for many seconds (probably not.)