diff --git a/packages/ember/addon/index.ts b/packages/ember/addon/index.ts
index 76248bf7a219..388d5dd1ab4e 100644
--- a/packages/ember/addon/index.ts
+++ b/packages/ember/addon/index.ts
@@ -5,26 +5,33 @@ import { next } from '@ember/runloop';
 import { assert, warn } from '@ember/debug';
 import Ember from 'ember';
 import { timestampWithMs } from '@sentry/utils';
-import { OwnConfig } from './types';
+import { GlobalConfig, OwnConfig } from './types';
+import { getGlobalObject } from '@sentry/utils';
 
 declare module '@ember/debug' {
   export function assert(desc: string, test: unknown): void;
 }
 
+function _getSentryInitConfig() {
+  const _global = getGlobalObject<GlobalConfig>();
+  _global.__sentryEmberConfig = _global.__sentryEmberConfig ?? {};
+  return _global.__sentryEmberConfig;
+}
+
 export function InitSentryForEmber(_runtimeConfig: BrowserOptions | undefined) {
-  const config = getOwnConfig<OwnConfig>().sentryConfig;
+  const environmentConfig = getOwnConfig<OwnConfig>().sentryConfig;
 
-  assert('Missing configuration.', config);
-  assert('Missing configuration for Sentry.', config.sentry || _runtimeConfig);
+  assert('Missing configuration.', environmentConfig);
+  assert('Missing configuration for Sentry.', environmentConfig.sentry || _runtimeConfig);
 
-  if (!config.sentry) {
+  if (!environmentConfig.sentry) {
     // If environment config is not specified but the above assertion passes, use runtime config.
-    config.sentry = { ..._runtimeConfig } as any;
+    environmentConfig.sentry = { ..._runtimeConfig } as any;
   }
 
-  // Permanently merge options into config, preferring runtime config
-  Object.assign(config.sentry, _runtimeConfig || {});
-  const initConfig = Object.assign({}, config.sentry);
+  // Merge runtime config into environment config, preferring runtime.
+  Object.assign(environmentConfig.sentry, _runtimeConfig || {});
+  const initConfig = Object.assign({}, environmentConfig.sentry);
 
   initConfig._metadata = initConfig._metadata || {};
   initConfig._metadata.sdk = {
@@ -38,10 +45,14 @@ export function InitSentryForEmber(_runtimeConfig: BrowserOptions | undefined) {
     version: SDK_VERSION,
   };
 
+  // Persist Sentry init options so they are identical when performance initializers call init again.
+  const sentryInitConfig = _getSentryInitConfig();
+  Object.assign(sentryInitConfig, initConfig);
+
   Sentry.init(initConfig);
 
   if (macroCondition(isDevelopingApp())) {
-    if (config.ignoreEmberOnErrorWarning) {
+    if (environmentConfig.ignoreEmberOnErrorWarning) {
       return;
     }
     next(null, function() {
diff --git a/packages/ember/addon/instance-initializers/sentry-performance.ts b/packages/ember/addon/instance-initializers/sentry-performance.ts
index 36b6c705d6dd..9c36b158c886 100644
--- a/packages/ember/addon/instance-initializers/sentry-performance.ts
+++ b/packages/ember/addon/instance-initializers/sentry-performance.ts
@@ -5,12 +5,16 @@ import * as Sentry from '@sentry/browser';
 import { Span, Transaction, Integration } from '@sentry/types';
 import { EmberRunQueues } from '@ember/runloop/-private/types';
 import { getActiveTransaction } from '..';
-import { browserPerformanceTimeOrigin, timestampWithMs } from '@sentry/utils';
+import { browserPerformanceTimeOrigin, getGlobalObject, timestampWithMs } from '@sentry/utils';
 import { macroCondition, isTesting, getOwnConfig } from '@embroider/macros';
-import { EmberSentryConfig, OwnConfig } from '../types';
+import { EmberSentryConfig, GlobalConfig, OwnConfig } from '../types';
 
 function getSentryConfig() {
-  return getOwnConfig<OwnConfig>().sentryConfig;
+  const _global = getGlobalObject<GlobalConfig>();
+  _global.__sentryEmberConfig = _global.__sentryEmberConfig ?? {};
+  const environmentConfig = getOwnConfig<OwnConfig>().sentryConfig;
+  Object.assign(environmentConfig.sentry, _global.__sentryEmberConfig);
+  return environmentConfig;
 }
 
 export function initialize(appInstance: ApplicationInstance): void {
diff --git a/packages/ember/addon/types.ts b/packages/ember/addon/types.ts
index 7aa20d00af4a..7490bb2d8129 100644
--- a/packages/ember/addon/types.ts
+++ b/packages/ember/addon/types.ts
@@ -18,3 +18,7 @@ export type EmberSentryConfig = {
 export type OwnConfig = {
   sentryConfig: EmberSentryConfig;
 };
+
+export type GlobalConfig = {
+  __sentryEmberConfig: EmberSentryConfig['sentry'];
+};