"Send to Connect" sometimes doesn't interpolate variables in the suggested GCODE file name

[DominikPalo]

Description of the bug

It happened to me twice today that after slicing and clicking on the "Send to Connect" button, the generated file name in the "Choose a printer" dialog contained variable names (like {printing_filament_types} and {print_time}) instead of the interpolated actual values. After closing the dialog and reopening it by clicking on the "Send to Connect" button again, the file name contained the real values as expected.

Project file & How to reproduce

1. Slice a 3D model
2. Click on the "Send to Connect" button
3. Sometimes the generated file name contains {printing_filament_types} and {print_time} variable names instead of their values

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

Version 2.9.0

Operating system

macOS Sequoia 15.1.1 (24B91)

Printer model

MK4