[Bug] Claude Opus 4.7 generating inappropriate casual slang in professional contexts

Bug Description
why is Opus 4.7 talking like this? I asked it to write a draft of a Slack message for me to send to a customer. It proposed " "Straight: we’ve seen it help on some alert cases"" what the actual hell? what did you do to this model??

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.118
• Feedback ID: ca63af01-896f-4dd6-b433-65daa9599138

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/prodanstatev/.local/share/claude/versions/2.1.118 (expected in multi-process scenarios)\n    at ai_ (/$bunfs/root/src/entrypoints/cli.js:2756:2177)\n    at IK8 (/$bunfs/root/src/entrypoints/cli.js:2756:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-23T04:22:13.751Z"},{"error":"MaxFileReadTokenExceededError: File content (68381 tokens) exceeds maximum allowed tokens (25000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file.\n    at i07 (/$bunfs/root/src/entrypoints/cli.js:4696:12702)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-23T04:23:11.287Z"}]