@ piper, no there is nothing on hold here.
I did reinstall by doing "apt install audacious" and some plugins were removed and some new was installed. Maybe it had something to do with some (already done) transitions before like the qt?
Now audacious is updated and the problem is gone.
apt install audacious
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
audacious-plugins audacious-plugins-data libaudcore5 libaudgui5
libaudtag3
The following packages will be REMOVED:
audacious-base-plugins audacious-gtk-plugins
The following NEW packages will be installed:
audacious-plugins libaudcore5 libaudgui5 libaudtag3
The following packages will be upgraded:
audacious audacious-plugins-data
2 upgraded, 4 newly installed, 2 to remove and 0 not upgraded.
Need to get 1938 kB of archives.
After this operation, 976 kB of additional disk space will be used.
Do you want to continue? [Y/n]