diff --git a/.github/workflows/windows-qt6.yml b/.github/workflows/windows-qt6.yml
index c49f3fe00e5f..df2915bbb513 100644
--- a/.github/workflows/windows-qt6.yml
+++ b/.github/workflows/windows-qt6.yml
@@ -43,6 +43,7 @@ jobs:
         with:
           repository: 'lexxmark/winflexbison'
           fileName: '*.zip'
+          # v2.5.25 is broken and will lead to random build failures because of race conditions, see https://github.com/lexxmark/winflexbison/issues/86
           tag: 'v2.5.24'
           extract: true