ਸੰਤ ਸਭਾ ਮਹਿ ਬੈਸਿ ਕਿ, ਕੀਰਤਿ ਮੈ ਕਹਾਂ ॥
Many old Saroops don't have a sihaari at the end of ਬੈਸਿ, including the teeka done by Giani Harbans Singh and Professor Sahib Singh. I personally think that this word should be without Sihaari as in old Saroops but in case the Sihaari is to be there for sure, then the reason for it could be either the word is of feminine gender noun or because it's a verb.
Many times verbs are made from nouns by adding a sihaari in the end e.g. ਜਪਿ. Similarly, many masculine nouns are made into feminine gender nouns by adding a sihaari in the end e.g. ਸੇਵਕੁ ਤੋਂ ਸੇਵਕਿ, ਦਾਸੁ ਤੋਂ ਦਾਸਿ.
Rest Gurbani is Agam Agaadh Bodh.
Kulbir Singh