Attached information that node B reject to MME
in common thing yes some of interaction with other procedure corelated like overwrite with HO procedure and something else.
another case but it was solved because some handset only support band 1 and after changed the reselection to band 1 it got resolved. but in this case i check UE supported in current layer so there is no limitation i believed. FYI handset is Hmd Global Oy TA-1165/C1