Sometimes LLD rule can create not correct triggers from trigger prototypes. It can exchange conditions from two and more trigger expression parts.
For example, trigger prototype is ({host:item[

{#MACRO}].regexp(^TEST$)})=0&{host:item[{#MACRO}

].strlen(#2)}#2. So triggers are created from the prototype can have the next expression ({host:item[

{#MACRO}].regexp(^TEST$)})#2&{host:item[{#MACRO}

].strlen(#2)}=0