Hello I'd like to reopen this issue, since I have a same error since one of the last Telerik Winform update. The current is 2019.2.618.40.
The reinstallation did not change the behaviour.
Error are shown in the attached image:
* Upper grid: Tried to sort by column "ID" in the the property builder.
* Lower gird: Tried to open property builder with defined sort descriptor.
How can I post my sample solution? I gave it to some colleagues. They can reproduce the behaviour.