System Information

• Steam Version: 1547865289

• Ubuntu 18.10 (x86_64)
• Opted into Steam client beta?: Yes
• Have you checked for system updates?: Yes

Issue

Receiving a message in an already opened chat windows results in showing the green unread message icon. Clicking on it opens up the chat but does not get rid of the icon. Restarting Steam does not help.

Steps for reproducing this issue:

1. Chat with someone
2. Receive a message while the chat-window is open, but not active

Workaround

The only way to remove the message is to write a new message to the contact.