diff --git a/apps/backend/src/route-handlers/smart-route-handler.tsx b/apps/backend/src/route-handlers/smart-route-handler.tsx
index 4648a19f7..55d0c9e54 100644
--- a/apps/backend/src/route-handlers/smart-route-handler.tsx
+++ b/apps/backend/src/route-handlers/smart-route-handler.tsx
@@ -23,14 +23,14 @@ class InternalServerError extends StatusError {
 }
 
 /**
- * Known errors that are common and should not be logged with their stacktrace.
+ * Some errors that are common and should not be logged with their stacktrace.
  */
-const commonErrors = [
-  ...getNodeEnvironment() === "development" ? [KnownError] : [],
-  KnownErrors.AccessTokenExpired,
-  KnownErrors.CannotGetOwnUserWithoutUser,
-  InternalServerError,
-];
+function isCommonError(error: unknown): boolean {
+  return KnownError.isKnownError(error)
+    || error instanceof InternalServerError
+    || KnownErrors.AccessTokenExpired.isInstance(error)
+    || KnownErrors.CannotGetOwnUserWithoutUser.isInstance(error);
+}
 
 /**
  * Catches the given error, logs it if needed and returns it as a StatusError. Errors that are not actually errors
@@ -130,7 +130,7 @@ export function handleApiRequest(handler: (req: NextRequest, options: any, reque
 
           if (!disableExtendedLogging) console.log(`[    ERR] [${requestId}] ${req.method} ${req.url}: ${statusError.message}`);
 
-          if (!commonErrors.some(e => statusError instanceof e)) {
+          if (!isCommonError(statusError)) {
             // HACK: Log a nicified version of the error instead of statusError to get around buggy Next.js pretty-printing
             // https://www.reddit.com/r/nextjs/comments/1gkxdqe/comment/m19kxgn/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button
             if (!disableExtendedLogging) console.debug(`For the error above with request ID ${requestId}, the full error is:`, errorToNiceString(statusError));
diff --git a/packages/stack-shared/src/interface/clientInterface.ts b/packages/stack-shared/src/interface/clientInterface.ts
index 7d7db0503..c0c4220e9 100644
--- a/packages/stack-shared/src/interface/clientInterface.ts
+++ b/packages/stack-shared/src/interface/clientInterface.ts
@@ -229,7 +229,7 @@ export class StackClientInterface {
       return Result.ok(await this.sendClientRequest(path, requestOptions, tokenStoreOrNull));
     } catch (e) {
       for (const errorType of errorsToCatch) {
-        if (e instanceof errorType) {
+        if (errorType.isInstance(e)) {
           return Result.error(e as InstanceType<E>);
         }
       }
diff --git a/packages/stack-shared/src/interface/serverInterface.ts b/packages/stack-shared/src/interface/serverInterface.ts
index c9699cc8f..b0862d559 100644
--- a/packages/stack-shared/src/interface/serverInterface.ts
+++ b/packages/stack-shared/src/interface/serverInterface.ts
@@ -5,8 +5,8 @@ import { filterUndefined } from "../utils/objects";
 import { Result } from "../utils/results";
 import { urlString } from "../utils/urls";
 import {
-    ClientInterfaceOptions,
-    StackClientInterface
+  ClientInterfaceOptions,
+  StackClientInterface
 } from "./clientInterface";
 import { ContactChannelsCrud } from "./crud/contact-channels";
 import { CurrentUserCrud } from "./crud/current-user";
@@ -70,7 +70,7 @@ export class StackServerInterface extends StackClientInterface {
       return Result.ok(await this.sendServerRequest(path, requestOptions, tokenStoreOrNull));
     } catch (e) {
       for (const errorType of errorsToCatch) {
-        if (e instanceof errorType) {
+        if (errorType.isInstance(e)) {
           return Result.error(e as InstanceType<E>);
         }
       }