Web API requests lead to "suspicious activity" e-mail with password reset

[ChrisBkt]

Plan

Premium

Country

Germany / Server with application running in Austria

Device

Dedicated Server

Operating System

Debian

My Question or Issue

My application is used to get information about playlist and track IDs like track-name and authors or playlist-tracks and their track data.
After a few requests from the server (running in austria) to the web-api, i have to re-login to my spotify on my PC and i get a E-Mail with a password reset because of suspicious activities.
I think this should not happen, because even if i reach the API limit, I should get a 429 Error.
And also after i changed my password once, i got the same E-Mail again.
So also my Server does not get whitelisted from spotify.