sway: Displays not shown in get_outputs

Hey! When connecting an external monitor (HDMI in my case), the display does not show up in my outputs. sway.log version: 1.0-alpha.6-268-gf6ad4908

Steps I did:

1. Login and start sway
2. Connect Monitor via HDMI
3. Open terminal and execute swaymsg -t get_outputs
4. Only my Laptop Monitor shows up

As nobody else seems to have this problem, does someone have a tip on what I could check to make it work or what I am doing wrong? Thanks in advance!