Extremely slow wireguard speeds when using iOS app configuration

Hello,

I have the problem when I use the iOS app to login to my mullvad account and connect to a server from the app I only get up to 5Mpbs download and 35Mpbs upload.
When I use the web admin panel and login from there to mullvad, i get around 600Mpbs download and 40Mpbs upload.

I testet it with the same servers but every time I used the iOS app to connect to mullvad the download speed was always extremely slow.

Is there something I can do about or is this maybe a already known bug?

Router: GL-AX1800 Flint
Firmware: 4.1.0 Release6

Thank you.

Which server location are you separately connected to at Mullvad?