Trick bug

[Bingedrinker]

Hi, was playing pvp earlier and I tricked an alolan muk which had assault vest with my scarfed rotom. Same turn he used knock off. Next turn he used poison jab and third turn he used knock off again.

 

Pmed my opponent about it, he told me the battle text said I had no item while I clearly had one on my screen.

 

Sadly I couldn't record it as I'm on phone for a few days.

I don't care about the lost rating but just wanted to see if it happened to other peoples ect and if there is a way to understand how the bug happens and how to avoid/fix it.