What is the bug or the crash?

When printing a detailed (GPX trace) line with filled layer style to PDF it takes a long time and creates radial unwanted linear artefacts from the start point to vertices making the PDF print output unusable

Example output:
A3L.pdf

Steps to reproduce the issue

1. Create a new project in ETRS89 (EPSG:4258)
2. Create a new layer from the example GPX trace in here, using "Tracks - MulitLineStringZ (1)" (gpx-zip)
3. In Layer / Properties /Symbology change "Simple Line" to "Filled lines" style
4. Create a new print layout, change paper size to A3 and add a map to the layout showing the line (on-screen preview is as expected)
5. Click print to PDF

Output: unusable line rendering as per attachment in bug description
Expected Output: correct render to PDF

If the line style is reverted to simple line then print performance and output are as expected

Versions

Libraries
Qt version
5.15.13
Python version
3.12.7
GDAL/OGR version
3.9.3
PROJ version
9.5.0
EPSG Registry database version
v11.016 (2024-08-31)
GEOS version
3.13.0-CAPI-1.19.0
SQLite version
3.46.1
PDAL version
2.8.1
PostgreSQL client version
16.2
SpatiaLite version
5.1.0
QWT version
6.3.0
QScintilla2 version
2.14.1
OS version
Windows 11 Version 2009

Active Python plugins
ViewshedAnalysis
1.9
db_manager
0.1.20
grassprovider
2.12.99
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