oData v4 error using $expand

Hello,

we are querying Teiid 9.1.4 using the following oData v4 syntax:

http://host:port/odata4/<vdbname>/<model-name>/<table-name>?$expand=<navigation>

It doesn't matter what navigation property we choose; we always get following error message:

{"error":{"code":null,"message":"String index out of range: -1"}}

Please find the attached logfile.