If the crashing occurred before applying the Phonon common libraries and QT5 upgrade, normal use is back. To me, that says that while not INDI related, the Phonon isn’t catastrophic in crashing PH2D.
In Linux, a package can be checked for dependencies. It isn’t unrealistic to think LIBINDI 1.8.8 has missing support packages. I have had to augment multiple packages in my past use. Whatever a developer has installed at build time, can creep into a package.
Keeping verbose logging on fills up space quickly when deducing a problem. Be sure verbose and to a file are enabled before each session. INDI, KSTARS, and Drivers used. One of them changed.