dbus.Int32.__str__ behavior changed in python-dbus 1.2.12 with python 3.8

With python-dbus 1.2.10 and python3.7 I get :

python3 -c 'import dbus; print(str(dbus.Int32(34)))'
34

but with With python-dbus 1.2.12 and python3.8 I get :

python3 -c 'import dbus; print(str(dbus.Int32(34)))'
dbus.Int32(34)

Is this intended ?

First reported in Hamster time tracker issue 447 where it brokes the software.