diff --git a/Meta/Azure/Lagom.yml b/Meta/Azure/Lagom.yml
index c572999c90..58ff17b8d4 100644
--- a/Meta/Azure/Lagom.yml
+++ b/Meta/Azure/Lagom.yml
@@ -146,8 +146,7 @@ jobs:
         env:
           SERENITY_SOURCE_DIR: '$(Build.SourcesDirectory)'
           CTEST_OUTPUT_ON_FAILURE: 1
-          # FIXME: enable detect_stack_use_after_return=1 #7420
-          ASAN_OPTIONS: 'strict_string_checks=1:check_initialization_order=1:strict_init_order=1:detect_stack_use_after_return=0'
+          ASAN_OPTIONS: 'strict_string_checks=1:check_initialization_order=1:strict_init_order=1:detect_stack_use_after_return=1'
           UBSAN_OPTIONS: 'print_stacktrace=1:print_summary=1:halt_on_error=1'
 
     - ${{ if and(eq(parameters.fuzzer, 'NoFuzz'), eq(parameters.os, 'Linux') ) }}: