okay tying to break down my interpretation,
The regular bearer appears irregularly if you know where to look.
"the" meaning there is only one specific "bearer"
"regular" meaning visiting on a regular basis, or producing/providing something on a regular basis. or possibly meaning "normal" or not unusual
"bearer" meaning one who bears something (bad news, news, flag, ring, gifts ect..) "bear" as in the actual animal.
"appears" meaning shows up, visits, or manifests, suddenly there/perceptible
"irregularly" meaning at an unusual time, or weird in some way
"if you know where to look" possibly referencing needing to find a bear or link to click on, or the answer is a puzzle and we need to name the place the "bearer appears irregularly"