As a part of fixes done in ZBX-21898 (notably, escaping added for "\" in history function parameters), the following frontend issue was found:
 
Add calculated item to host (note backslash in the string parameter needs to be escaped):

count(/Zabbix server/trap1, #1, "eq", "{$MACRO: \"static\\text\"}")

Add macro to host with some 123 value

{$MACRO: "static\text"}

Now open Item test dialog and see that frontend does not propose value for it from existing macros, just

{$MACRO: \"static\\text\"} = {$MACRO: \"static\\text\"}

is shown in the Macros list.

Expected: {$MACRO: "static\text"} = 123 to be listed in Item test dialog.