diff --git a/lib/push/send-utils.js b/lib/push/send-utils.js
--- a/lib/push/send-utils.js
+++ b/lib/push/send-utils.js
@@ -993,7 +993,25 @@
   }
 
   try {
-    await Promise.allSettled(olmSessionCreationPromises);
+    // The below is equvialent to
+    // Promise.allSettled(olmSessionCreationPromises), which appears to be
+    // undefined in Android (at least on debug builds) as of Sept 2024
+    await Promise.all(
+      olmSessionCreationPromises.map(async promise => {
+        try {
+          const result = await promise;
+          return ({
+            status: 'fulfilled',
+            value: result,
+          }: $SettledPromiseResult<void>);
+        } catch (e) {
+          return ({
+            status: 'rejected',
+            reason: e,
+          }: $SettledPromiseResult<void>);
+        }
+      }),
+    );
   } catch (e) {
     // session creation may fail for some devices
     // but we should still pursue notification