Steps to reproduce:

1. create discovery rule
2. create calculated item or a trigger with LLD function macro
3. use iregsub function macro with:
   • pattern

     .*

• • template (what to replace the match with)

    \"\a

1. wait for discovery to take effect and create items

Result:
When creating an item with resolved macro function, the resolved function:

• has value of

  "\a

• instead of

  \"\a