AI completely misses the fact that no filament was extruded

### Type of issue Other (functional bug, wrong result, UI glitch, etc.) ### Bambu Studio Version 2.7.1.62 ### Where is the application from? Bambu Lab Official website ### OS version MacOS 26.6 ### Additional system information _No response_ ### Printer X1C ### How to reproduce Print any file with the generic PETG-CF profile One print was fine. Second print, a half hour in, it was printing air. Verified with max temp nozzle and manual purge for clogging that filament extrudes. Hit print again, sure enough nothing extruded, AND ( ! ) calibration says everything is ok ?!?! I manually edited the filament profile to 270 - 300 and now calibration is OK. ### Actual results Printer starts up and does the calibration test, and fails to see that NO filament was extruded. Printer continues to print, but fails to see that it is printing " air " ### Expected results The printer / AI should capture the fact that there is nothing read or seen during calibration. The printer / AI should capture the fact that there is no filament moving and that there is no object appearing within the printer. ### File uploads (project / log / crash dump / performance profile) Not lag. Not a project. This is a software/firmware issue. ### Checklist of files to include - [ ] Project file (always) - [ ] Log file (always) - [ ] Crash dump / report — required for crash / freeze issues (Windows .dmp / macOS .ips / Linux gdb backtrace) - [ ] Performance profile — required for performance / lag issues