TS5 Bugreport TS-Banner

After the Update 5.0.0-beta.24 something with the banners are wrong.
We are Hosting TS3Banners, our banners will show up on TS3 Clients, but not on TS5-Clients.

The TS5 Client shows only a Broken-Image icon

Details:

Greetings from Germany,
Stefan