pass isServer to betaABTests

Author: Jakeii

dotcom-rendering/src/components/SetABTests.importable.tsx

@@ -11,6 +11,7 @@ import { setABTests, setBetaABTests } from '../lib/useAB';
 import type { ABTestSwitches } from '../model/enhance-switches';
 import type { ServerSideTests } from '../types/config';
 import { useConfig } from './ConfigContext';
+import { isServer } from '../lib/isServer';
 
 type Props = {
 	abTestSwitches: ABTestSwitches;
@@ -92,9 +93,14 @@ export const SetABTests = ({
 
 	const betaAb = useMemo(
 		() =>
-			new BetaABTests({
-				serverSideABTests,
-			}),
+			new BetaABTests(
+				isServer
+					? {
+							serverSideABTests,
+							isServer: true,
+					  }
+					: { isServer: false },
+			),
 		[serverSideABTests],
 	);