Similar problem as ZBX-21818{}

Steps to reproduce:

1. create host macro
2. create Script item
3. add param with value from example host macro
4. add basic script (whatever you want)
   • var param=JSON.parse(value);
     return JSON.stringify(param);
5. apply
6. test
7. get value and test
8. return error
   • Cannot execute script: SyntaxError: invalid json (at offset 1) at [anon] (duktape.c:37568) internal at parse () native strict preventsyield at [anon] (function:1) preventsyield

bug_script_item.mp4

Result:
The problem seems to be in passing the macro to the test script. When I save the item and press execute now, zabbix returns the correct value in latest data.