Is it a sin to consult two different people regarding one divorce issue, when both individuals belong to the same fatwa issuing body?

There is no objection to your asking another Mufti about conditional divorce, as you are not obligated to ask the first Mufti. This is because the duty of a layperson is to ask someone whose piety and knowledge they trust, so they can act upon their fatwa, in accordance with the Almighty's saying: ﴿So ask the people of the message if you do not know.﴾ [An-Nahl: 43]. Therefore, one should strive to know the most knowledgeable person of their time. However, moving between Muftis seeking leniency is forbidden by Sharia because it is a pursuit of forbidden whims. We advise the husband to be careful of anger and uttering divorce as a means to solve problems, and we advise the wife to avoid any reason that might provoke her husband.