diff --git a/packages/angular_devkit/build_angular/src/webpack/plugins/css-optimizer-plugin.ts b/packages/angular_devkit/build_angular/src/webpack/plugins/css-optimizer-plugin.ts
index a43eb74a3e4f..00ecefdc5676 100644
--- a/packages/angular_devkit/build_angular/src/webpack/plugins/css-optimizer-plugin.ts
+++ b/packages/angular_devkit/build_angular/src/webpack/plugins/css-optimizer-plugin.ts
@@ -159,11 +159,12 @@ export class CssOptimizerPlugin {
       // browserslist uses the name `ios_saf` for iOS Safari whereas esbuild uses `ios`
       if (browserName === 'ios_saf') {
         browserName = 'ios';
-        // browserslist also uses ranges for iOS Safari versions but only the lowest is required
-        // to perform minimum supported feature checks. esbuild also expects a single version.
-        [version] = version.split('-');
       }
 
+      // browserslist uses ranges `15.2-15.3` versions but only the lowest is required
+      // to perform minimum supported feature checks. esbuild also expects a single version.
+      [version] = version.split('-');
+
       if (esBuildSupportedBrowsers.has(browserName)) {
         if (browserName === 'safari' && version === 'TP') {
           // esbuild only supports numeric versions so `TP` is converted to a high number (999) since