Layout: data-defined properties on a shape item not automatically run

[DelazJ]

What is the bug or the crash?

In a layout, I want to build a 1 ha square shape item whose size should follow the map item scale: both width and height properties are thus set to (in cm)

10000/map_get(item_variables('Map 1'), 'map_scale')

When the map scale varies, the shape item does unfortunately not change. I need to press the Refresh button to get a result.

Steps to reproduce the issue

Enregistrement.de.l.ecran.2023-12-07.a.17.29.52.mov

Versions

QGIS version	3.34.1-Prizren	QGIS code revision	1339274
Qt version	5.15.2
Python version	3.9.5
GDAL/OGR version	3.3.2
PROJ version	8.1.1
EPSG Registry database version	v10.028 (2021-07-07)
GEOS version	3.9.1-CAPI-1.14.2
SQLite version	3.35.2
PDAL version	2.3.0
PostgreSQL client version	unknown
SpatiaLite version	5.0.1
QWT version	6.1.6
QScintilla2 version	2.11.5
OS version	macOS 13.6
Active Python plugins
changeDataSource	3.1
qtribu	0.14.2
bdtopo_importer	0.2
MemoryLayerSaver	4.0.4
lizmap	3.8.3
StreetView	3.2
db_manager	0.1.20
MetaSearch	0.3.6
MapsPrinter	0.9
processing	2.12.99

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response

[nyalldawson]

Duplicate of #26657

[DelazJ]

Sorry I didn't search for an earlier report