After narrowing down the problem and further research i was able to solve it with the help of another post on this forum from @Pino 
It seems like there is a problem with the wpa_supplicant package regarding connecting to WPA2 + WPA3 (mixed mode) wifi’s. As soon as i installed the packages iwd and networkmanager-iwd-overlay (AUR), removing wpa_supplicant and then rebooting i was able to connect to my wifi without a problem.
Forumpost:
Manjaro does not connect to WPA2/3 mixed WIFI network
Additional info:
ArchWiki - Network Configuration - Wireless - WPA2
ArchWiki - iwd
AUR - networkmanager-iwd-overlay
// Edit: This seems to be a known problem as a bug report to this already exists for the package wpa_supplicant which you can find here: Archlinux - Bugs - FS#73844
As of right now this probably won’t get fixed as it seems to be a problem on the router site and not on the client site. A specific description of the problem and additional workarounds (which don’t include using an old AUR package instead) can be found here: infradead.org - Bug#1003907