Docs: Mention that fields with dots do not work
The dot is used as a splitting character internally for looking up
values in the array compare condition, thus the user should use the
script condition in such cases.
@@ -42,6 +42,9 @@ than or equal to 25:
<4> The comparison value. Supports date math like the
<<compare-condition-date-math, compare condition>>.
+NOTE: When using fieldnames that contain a dot this condition will not
+work, use a <<condition-script,script condition>> instead.
+
==== Array-Compare Condition Attributes
[options="header"]
