Then you are still using a 4.X version.
4.x of what exactly?
With Squidex 5.0 I have introduced a big change, thats allows custom ids for assets and contents. This change requires a migration, therefore some collections are updated with the 2 suffix.
Oh, I see 
Everything is working now btw so you can go ahead and close the thread if you want. Thanks for the help, greatly appreciated!
It is still weird why it crashes when you reset the consumer, but because it is 4.X I am going to close it for now.