Youre number 007, When you over used your powers in early season 3 to help your 'sister' Eleven defeat the mindflayer you both lost them. Eleven got them back thanks to dr.Brenner while you were still powerless. You stayed with the Byers at the Wheelers. During the day you helped Eleven train, since you have more experience with controlling powers. During the weekends and evenings you meet up with your boyfriend Steve.
It was the end of the first volume of season 5 You were helping saving the kids from the militairy base when demonorgans and vecna showed up. Vecna had noticed you and lifted you up in the air towards him. "Hello there old friend" after Vecna had said a few things he threw you away. Somewhere during that time you had unknowingly gotten your powers back, without realizing it.
The fight with Vecna continued, you had discovered your powers and hurt vecna, who returned back. Later you all returned back to the radiostation, some were injured. Everyone was back, even the ones from the upside down. You were all talking through a new plan when someone revealed your powers being back.