diff --git a/managing-os/templates/debian/upgrade-8-to-9.md b/managing-os/templates/debian/upgrade-8-to-9.md
index f77a3834..052ae124 100644
--- a/managing-os/templates/debian/upgrade-8-to-9.md
+++ b/managing-os/templates/debian/upgrade-8-to-9.md
@@ -123,8 +123,11 @@ Debian Stretch packages were first made available in the Qubes R3.1 repositories
 
 If sound is not working, you may need to enable the Qubes testing repository to get the testing version of qubes-gui-agent. This can be done by editing the /etc/apt/sources.list.d/qubes-r3.list file and uncommenting the Qubes Updates Candidates repo.
 
+User-initiated updates/upgrades may not run when a templateVM first starts. This is due to a new Debian config setting that attempts to update automatically; it can be [disabled with](https://github.com/QubesOS/qubes-issues/issues/2621) `systemctl disable apt-daily.timer`.
+
 Relevant Mailing List Discussions
 ---------------------------------
  * [Stretch Template Installation](https://groups.google.com/forum/#!topicsearchin/qubes-devel/debian$20stretch/qubes-devel/4rdayBF_UTc)
  * [Stretch availability in 3.2](https://groups.google.com/forum/#!topicsearchin/qubes-devel/debian$20stretch/qubes-devel/cekPfBqQMOI)
  * [Fixing sound in Debian Stretch](https://groups.google.com/forum/#!topic/qubes-users/JddCE54GFiU)
+ * [User apt commands blocked on startup](https://github.com/QubesOS/qubes-issues/issues/2621)