diff --git a/lib/omniauth/flexible_strategy.rb b/lib/omniauth/flexible_strategy.rb
index ee37b52d3f..105599d93f 100644
--- a/lib/omniauth/flexible_strategy.rb
+++ b/lib/omniauth/flexible_strategy.rb
@@ -40,7 +40,7 @@ module OmniAuth
 
   module FlexibleStrategy
     def on_auth_path?
-      (match_provider! || false) && super
+      possible_auth_path? && (match_provider! || false) && super
     end
 
     ##
@@ -72,6 +72,13 @@ module OmniAuth
       "#{path_prefix}/#{name}"
     end
 
+    ##
+    # Returns true if the current path could be an authentication request,
+    # false otherwise (e.g. for resources).
+    def possible_auth_path?
+      current_path =~ /\A#{path_prefix}/
+    end
+
     def providers
       @providers ||= OpenProject::Plugins::AuthPlugin.providers_for(self.class)
     end