IVGCVSW-4041 Adding Instance Normalization issue to FAQ

 * Added note to explain Instance Normalization failures to the FAQ.

Signed-off-by: Mike Kelly <mike.kelly@arm.com>
Change-Id: Ie1361ece06c6f10d6faac2dd6e480393ab1b2f77
diff --git a/docs/FAQ.md b/docs/FAQ.md
index e6a761e..e62bf54 100644
--- a/docs/FAQ.md
+++ b/docs/FAQ.md
@@ -33,3 +33,8 @@
 https://github.com/ARM-software/armnn/tree/v19.08
 https://github.com/ARM-software/computelibrary/tree/v19.08
 
+Instance Normalization test failures 
+------------------------------------
+
+There is a known issue in the Android NNAPI implementation of Instance Normalization that will be fixed in an upcoming revision of Android 10. Using the Arm NN Android NNAPI driver with versions of the Android 10 VTS and CTS tests that do not have that fix will generate multiple Instance Normalization failures. 
+