Upon her return to Bosnia, Jelena presided over an assembly (stanak) in Mile and confirmed the possessions and privileges of the noblemen of "all of Bosnia, Donji Kraji, Zagorje and the Hum land". In May 1355 she decided to take an active part in the dispute over the Šubić family inheritance, which had been ongoing since the death of her brother Mladen in 1348. Jelena marched with Tvrtko and their army to Duvno.
Upon returning to Bosnia, Jelena presided over a gathering (stanak) in Mile and confirmed the rights and privileges of nobles from all of Bosnia, Donji Kraji, Zagorje, and the Hum region. In May 1355, she joined forces with Tvrtko and their army to address the ongoing dispute over the Šubić family inheritance, which had been unresolved since her brother Mladen's death in 1348. Jelena marched to Duvno with them.