I have investigated the issue. The data is correctly tracked and also correctly included in the resulting datatable returned by the API method. The problem is a result of the SafeDecodeLabel filter that is applied to in the DataTablePostProcessor, which does a urldecode on all lables. As the device name includes a +, it's converted to a .

@mattab @tsteur @diosmosis does anyone have a good idea how to tackle that? Removing the SafeDecodeLabel might have various side effects. Also there might be labels containing a + that should be converted to a space 🤷‍♂️

This is a similar problem I tried to solve here: #13481

Every change I made resulted in a new broken test, haven't worked on it in a while.

As it has been a few months since the last activity and we believe this is likely not an issue anymore, we will now close this. If that's not the case, please do feel free to either reopen this issue or open a new one. We will gladly take a look again!