Service announcement regarding issues with ETRS89-related coordinate transformations with PROJ 9.8.0: https://lists.osgeo.org/pipermail/gdal-dev/2026-April/061491.html
[gdal-dev] ETRS89 issues with PROJ 9.8.0

End of service annoucement: PROJ 9.8.1 has been released: https://lists.osgeo.org/pipermail/proj/2026-April/012095.html
[PROJ] PROJ 9.8.1 is released