That "the short lived (1353-1391)" is a period of Tvrtko I Kotromanic' reign not Bosnian statehood period.
Tvrtko I began his ruling in Bosnia in 1353 as a Ban and in 1377 as a King (first Bosnian King) untill he died in 1391. He was inherited by Stjepan Dabisa, next Bosnian King. And till the Ottomans conquered Bosnia in 1463, there were several more Kings/Queens of Bosnia besides Tvrtko I (Kotromanic dinasty: King Stjepan Dabisa, Queen Jelena Gruba, King Stjepan Ostoja, King Stjepan Ostojic, King Stjepan Tvrtko II, King Stjepan Tomas, Queen Katarina Kosaca, King Stjepan Tomasevic etc.).
This source that you found on Wikipedia is written by Serb author. You must know that Serb historyography wants to proclaim Bosnia and Zeta/Duklja as "medieval Serbian states", not just medieval, but todays. That's main reason we had recent wars in Balkan. These authors consider Bosnia and Zeta(Duklja) "medieval Serbian states", what is not truth. Although, Zeta, in that time, was under selfcalled Tzar Dushan's state, but it does not make Zeta a Serbian state if it's under Serbian command in that time (Bosnia was under Hungary in many periods but it was not Hungarian state if you copy me). While Bosnia was not under Dushan' state during his reign, it was independent before and during Dushan as Banate and after Dushan as Banate and Kingdom.
You cannot make this mod by researching only Wikipedia where everyone can write what ever he feals like. How can that be reliable source. It's just not serious and historcally correct research.
Before 1353, Bosnia was also totally independent as Banate of Bosnia (take a look at Tsardoms mod) with Ban Stjepan II Kotromanic (Kotromanic: Bosnian noble family). From 950 to 1180 Bosnia was semi-independent (usually Hungarian/Byzantine vassal) and from 1180 to 1463 totally independent (1180-1377 as Banate, after 1377 till 1463 as Kingdom). I advise you to read something neutral, that was not written in Wikipedia or by any Balkan historian. Try, for the beginning to read a book from British historian Noel Malcolm: "Bosnia-A Short History" and tell me if I am wrong.