For people facing the bug, also the output of these could help:
gdbus call --session --dest com.canonical.Unity.Panel.Service.Desktop --object-path /com/canonical/Unity/Panel/Service --method com.canonical.Unity.Panel.Service.SyncOne 'libappmenu.so' wnckprop --list
For people facing the bug, also the output of these could help:
gdbus call --session --dest com.canonical. Unity.Panel. Service. Desktop --object-path /com/canonical/ Unity/Panel/ Service --method com.canonical. Unity.Panel. Service. SyncOne 'libappmenu.so'
wnckprop --list