There are reports about regressions
https://lists.qt-project.org/pipermail/qt-creator/2024-November/009322.html
https://lists.qt-project.org/pipermail/qt-creator/2024-November/009323.html

While mentioning 'master', these seem to apply also to 15.0

This affects both internal and external terminal. There /might/ to be some flakiness involved, as I had the impression that "internal" worked in some cases, but this might just have been a case where I started the wrong creator binary.

This worked with 14.0