Modifier "solid infill speed" does not work

[Moyrn]

Description of the bug

I want to change speed on a fragile part of the print. I add a modifier, and try to change speed most of the speeds can be changed, but not SOLID INFILL SPEED. It remains at the normal speed as defined for the whole print. Can be visualized in the preview. In my case, i put everything to 60mm/s... but the solid infill stays "yellow" at 200mm/s I also exported the gcode, and gcode viewer confirms that this is not a prusa slicer display issue it is embedded in generated gcode

Project file & How to reproduce

see project file sheol-capot-noTower-TEST-1c.zip

Checklist of files included above

• [X] Project file
• [X] Screenshot

Version of PrusaSlicer

2.7.1

Operating system

Windows 10

Printer model

Prusa XL

[Moyrn]

changing global solid infill speed is OK

changing only modifier is not