Unburden was not Activating

RylokTCG

I am competing in the blueberry prologue and there have been multiple instances where my Sceptile with unburden has not been working. I'm using shed tail with a sitrus berry. Later in the match when I bring Sceptile back into battle the opposing pokemon still outsped Sceptile despite the held item being gone and the opposing pokemon having no speed boosts of their own.

pikayou

That's how it's supposed to work, you lose the unburden boost when you switch out (unless you can get and use a new item)