diff --git a/generators/server/templates/src/main/java/_package_/config/SecurityJwtConfiguration.java.ejs b/generators/server/templates/src/main/java/_package_/config/SecurityJwtConfiguration.java.ejs
index 5cdcbf04c01..42e2af704a5 100644
--- a/generators/server/templates/src/main/java/_package_/config/SecurityJwtConfiguration.java.ejs
+++ b/generators/server/templates/src/main/java/_package_/config/SecurityJwtConfiguration.java.ejs
@@ -26,6 +26,8 @@ import com.nimbusds.jose.jwk.source.ImmutableSecret;
 import com.nimbusds.jose.util.Base64;
 import javax.crypto.SecretKey;
 import javax.crypto.spec.SecretKeySpec;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -46,6 +48,8 @@ import org.springframework.security.oauth2.server.resource.web.DefaultBearerToke
 @Configuration
 public class SecurityJwtConfiguration {
 
+    private final Logger log = LoggerFactory.getLogger(SecurityJwtConfiguration.class);
+
     @Value("${jhipster.security.authentication.jwt.base64-secret}")
     private String jwtKey;
 
@@ -62,6 +66,13 @@ public class SecurityJwtConfiguration {
                             metersService.trackTokenExpired();
                         } else if (e.getMessage().contains("Failed to validate the token")) {
                             metersService.trackTokenInvalidSignature();        
+                        } else if (
+                            e.getMessage().contains("Invalid JWT serialization:") ||
+                            e.getMessage().contains("Invalid unsecured/JWS/JWE header:")
+                        ) {
+                            metersService.trackTokenMalformed();
+                        } else {
+                            log.error("Unknown JWT reactive error {}", e.getMessage());
                         }
                     });
             } catch (Exception e) {
@@ -69,6 +80,8 @@ public class SecurityJwtConfiguration {
                     metersService.trackTokenMalformed();
                 } else if (e.getMessage().contains("Failed to validate the token")) {
                     metersService.trackTokenInvalidSignature();
+                } else {
+                    log.error("Unknown JWT error {}", e.getMessage());
                 }
                 throw e;
             }
@@ -86,6 +99,8 @@ public class SecurityJwtConfiguration {
                     e.getMessage().contains("Invalid unsecured/JWS/JWE")
                 ) {
                     metersService.trackTokenMalformed();
+                } else {
+                    log.error("Unknown JWT error {}", e.getMessage());
                 }
                 throw e;
             }