Read all the changelogs and haven't seen mention of these but these 4 moves and 1 ability dont work 100% like they should.
The moves are as follows:
Trick (the items reset when you switch so the focus sash i just swapped for my choice scarf turns back into a choice scarf when i switch back in)
aromatherapy (heals only the user, not the team)
heal bell (heals only the user, not the team)
magic coat (reflects status fine but not stealth rocks, it only protects against)
and the ability:
magic bounce (reflects status fine but only protects against rocks)

I've fixed Aromatherapy/Heal Bell and Magic Coat/Bounce. However, I can't reproduce your issue with Trick.

Facing an NPC Trainer, my Pokémon had a Choice Scarf and the opposing Pokémon had a Focus Sash. After using Trick, switching Pokémon, and switching back, my Pokémon was not locked into a move, and using Trick again confirmed that my Pokémon still had a Focus Sash as expected.

I haven't battled an NPC trainer for a long time but last time I checked they didn't switch Pokemon.
I use a frisk furret so I can see what item I'm up against.
If I had my pc and you had time id invite you to initia nova to test it in person.
Picture this:
I trick a choice scarf onto a Pokemon steelix that has leftover. He's now locked into stealth rocks. He has to switch so I use this scenario to switch as well.
When I switch ferret back in, I find I'm getting locked into moves like I'm choiced. And the steelix is setting up like he's not. That's what I mean.

This ticket is expired. If you believe this is still an issue, please make a new ticket.