diff --git a/docs/releases/v2021.1.1.rst b/docs/releases/v2021.1.1.rst
index 8d5e626b..009a81ea 100644
--- a/docs/releases/v2021.1.1.rst
+++ b/docs/releases/v2021.1.1.rst
@@ -40,6 +40,9 @@ Bugfixes
 Known issues
 ------------
 
+* Sysupgrade does not work on JOY-IT OR750i, devices running this release need to be recovered with an image newer than v2021.1.2 manually.
+  (`#2839 <https://github.com/freifunk-gluon/gluon/issues/2839>`_)
+
 * Upgrading EdgeRouter-X from versions before v2020.1.x may lead to a soft-bricked state due to bad blocks on the NAND flash which the NAND driver before this release does not handle well.
   (`#1937 <https://github.com/freifunk-gluon/gluon/issues/1937>`_)
 
diff --git a/docs/releases/v2021.1.2.rst b/docs/releases/v2021.1.2.rst
index 70667555..517cd1a4 100644
--- a/docs/releases/v2021.1.2.rst
+++ b/docs/releases/v2021.1.2.rst
@@ -103,6 +103,9 @@ Other improvements
 Known issues
 ------------
 
+* Sysupgrade does not work on JOY-IT OR750i, devices running this release need to be recovered with an image newer than v2021.1.2 manually.
+  (`#2839 <https://github.com/freifunk-gluon/gluon/issues/2839>`_)
+
 * Upgrading EdgeRouter-X from versions before v2020.1.x may lead to a
   soft-bricked state due to bad blocks on the NAND flash which the NAND driver
   before this release does not handle well.