Unexpected behaviour when subscribing to same topic regular and $shared

[HerrDerb]

🐛 Bug Report

When subscribing to a topic once normal and once as shared, the incoming messages are notified twice for each subscription.

🔬 How To Reproduce

Subscribe to topics:

• myTopic
• $shared/group1/myTopic

Send message on topic myTopic Each subscription will be notified twice.

📈 Expected behavior

Expected would be on invocation of each subscription.

📎 Additional context

Version: 1.3.3

[HerrDerb]

hi @Donnerbart . If there is no importance for this bug, I'll close the issue. What is your opinion?