diff --git a/server/routers/siteResource/createSiteResource.ts b/server/routers/siteResource/createSiteResource.ts
index 0da48d160..01f7a0d9c 100644
--- a/server/routers/siteResource/createSiteResource.ts
+++ b/server/routers/siteResource/createSiteResource.ts
@@ -496,11 +496,6 @@ export async function createSiteResource(
                     );
                 }
             }
-
-            await rebuildClientAssociationsFromSiteResource(
-                newSiteResource,
-                trx
-            ); // we need to call this because we added to the admin role
         });
 
         if (!newSiteResource) {
@@ -526,6 +521,22 @@ export async function createSiteResource(
             await createCertificate(domainId, fullDomain, db);
         }
 
+        // Run in the background after the response is sent. Wrapped in its
+        // own transaction so it always executes on the primary — avoiding any
+        // replica-lag issues while still allowing the HTTP response to return
+        // early.
+        db.transaction(async (trx) => {
+            await rebuildClientAssociationsFromSiteResource(
+                newSiteResource!,
+                trx
+            );
+        }).catch((err) => {
+            logger.error(
+                `Error rebuilding client associations for site resource ${newSiteResource!.siteResourceId}:`,
+                err
+            );
+        });
+
         return response(res, {
             data: newSiteResource,
             success: true,
diff --git a/server/routers/siteResource/updateSiteResource.ts b/server/routers/siteResource/updateSiteResource.ts
index d0efa0cf4..8a3f93326 100644
--- a/server/routers/siteResource/updateSiteResource.ts
+++ b/server/routers/siteResource/updateSiteResource.ts
@@ -431,9 +431,6 @@ export async function updateSiteResource(
                     })
                     .returning();
 
-                // wait some time to allow for messages to be handled
-                await new Promise((resolve) => setTimeout(resolve, 750));
-
                 const sshPamSet =
                     isLicensedSshPam &&
                     (authDaemonPort !== undefined ||
@@ -556,11 +553,6 @@ export async function updateSiteResource(
                         }))
                     );
                 }
-
-                await rebuildClientAssociationsFromSiteResource(
-                    updatedSiteResource,
-                    trx
-                );
             } else {
                 // Update the site resource
                 const sshPamSet =
@@ -690,7 +682,24 @@ export async function updateSiteResource(
                 }
 
                 logger.info(`Updated site resource ${siteResourceId}`);
+            }
+        });
 
+        // Background: wait for removal messages to propagate, then rebuild
+        // associations for the re-created resource. Own transaction ensures
+        // execution on the primary against fully committed state.
+        (async () => {
+            await db.transaction(async (trx) => {
+                if (!updatedSiteResource) {
+                    throw new Error("No updated resource found after update");
+                }
+                if (sitesChanged) {
+                    await new Promise((resolve) => setTimeout(resolve, 750));
+                    await rebuildClientAssociationsFromSiteResource(
+                        updatedSiteResource,
+                        trx
+                    );
+                }
                 await handleMessagingForUpdatedSiteResource(
                     existingSiteResource,
                     updatedSiteResource,
@@ -700,7 +709,12 @@ export async function updateSiteResource(
                     })),
                     trx
                 );
-            }
+            });
+        })().catch((err) => {
+            logger.error(
+                `Error rebuilding client associations for site resource ${updatedSiteResource?.siteResourceId}:`,
+                err
+            );
         });
 
         return response(res, {