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Periods should not be used in any ID!
Using periods will prevent realtime from working. For example if your database id contains a period like here "JAx86RQ2r-VoD4POi.Tk" it will then looks like this "databases.JAx86RQ2r-VoD4POi.Tk.collections" if you want to listen to a specific channel. This way you will receive no incoming data!
TL;DR
Using periods in the ID for a specific channel will prevent the realtime feature from working properly. This issue is explained in detail in the provided GitHub link. 
lol...
And I was wondering why my realtime did not work <:PES2_Apathy:888440873094873099>
