PartDesign: Hole Parameter window does not show Custom head value after project save and reopen

Problem description

If you create a hole ex: iso metric M4x0.7 head Iso 14583 and then change custom head values to ex: head diameter 9mm,head depth 10mm and save/close the project and reopen it and double click the hole in the three the Custom values are gone, will the drawing still is correct.

Workbench affected?

Part Design

Steps to reproduce

test.zip extract zip file open freecad test file double click the hole in the tree, you should see parameter box as in picture

to test create a hole iso metric, M4x0.7, head Iso 14583 check custom head values, enter head values diam & Depth, click ok save project and close it open project double click the hole in the tree, you should see parameter box as in picture

Expected behavior

After save Hole Parameters box should show the parameters like at the moment of creation

Actual behavior

Custom head value is unchecked and custom values are not shown

Development version About Info (in Safe Mode)

tested in Version 1.1.1, 1.1.3 and weekly build

OS: Windows 11 build 26200
Architecture: x86_64
Version: 26.3.0dev.20260916 (Git shallow)
Build date: 2026/09/16 06:32:59
Build type: Release
Branch: (HEAD detached at a4ce44d33)
Hash: a4ce44d33b7e42e16cb8156058a1894237042ab4
Python 3.11.14, Qt 6.8.3, Coin 4.0.10 (bundled), Pivy 0.6.11 (bundled), Vtk 9.3.0, boost 1_84, Eigen3 3.4.0, PySide 6.8.3
shiboken 6.8.3, xerces-c 3.3.0, Clipper2 , IfcOpenShell 0.0.0, OCC 7.8.1
Locale: Dutch/Belgium (nl_BE)
Stylesheet/Theme/QtStyle: FreeCAD.qss/FreeCAD Dark/
QPA/File dialog/Color dialog: windows/via Win32/via Qt
Navigation Style/Orbit Style/Rotation Mode: CAD/Rounded Arcball/Window center
Logical DPI/Physical DPI/Pixel Ratio: 96/141.767/1
OpenGL version/vendor/renderer: 4.6.0 - Build 32.0.101.8831/Intel/Intel(R) Arc(TM) Pro Graphics

Last known good version (optional)