Labels: Line direction symbols not displayed

[DBREF]

What is the bug or the crash?

I'm working on a railway project which features a multi-line layer containing the gradient and length of the track in per mille as a feature. The line is symbolized as dashed line with points on changes of inclination. When using QGIS 3.38 the line direction symbols (<, >) are not being displayed anymore. It worked with QGIS 3.34 LTR.

My current alternative solution is creating an additional symbology as a marker line with an arrow showing the line direction (so QGIS reads and processes the line direction). Now the labels overlap the arrow symbols.

Steps to reproduce the issue

Use a multine-line layer with features that can be used as label. Enable line direction symbols and see that nothing happens. Worked in QGIS 3.34. LTR.

Versions

QGIS version
3.38.3-Grenoble
QGIS code revision
37f9e6e
Qt version
5.15.13
Python version
3.12.6
GDAL/OGR version
3.9.2
PROJ version
9.4.0
EPSG Registry database version
v11.004 (2024-02-24)
GEOS version
3.12.2-CAPI-1.18.2
SQLite version
3.45.1
PDAL version
2.6.3
PostgreSQL client version
16.2
SpatiaLite version
5.1.0
QWT version
6.2.0
QScintilla2 version
2.14.1
OS version
Windows 11 Version 24H2

Active Python plugins
GeoBasis_Loader
1.0
GeoCoding
2.19
db_manager
0.1.20
grassprovider
2.12.99
MetaSearch
0.3.6
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