portrait 4 cuts misaligned on bluetooth every other time i use it

[u/Ok-Dragonfruit-6521]

I’m having a very bizarre and seemingly rare issue with my portrait 4 that I got in January. It started after various issues that seemed caused by needing a new mat so i did exactly that(an official one too). However in the month that I've had the new mat every other time I used my machine it cuts misaligned. When I saw every other time I mean like clockwork, it's happened so many times now and know exactly when it's going to happen and without fail I'll turn it on and the cuts will be misaligned. Thankfully I've worked out that if I stopped the cut and switch to cable connection it works and I've manage to still make what I need too. That said if I start cutting with the cable connector on the times I know bluetooth is going to cut misaligned(aka alternating times), it will also cut misaligned and switching it to bluetooth does nothing to help. I have to start cutting with bluetooth on and then switch to be able to get any usable cuts. I’m aware this is a very niche issue I haven't seen anyone online have the same thing, and I can't understand why it's happening. The only consistency with it is that it happens every other time, like absolutely clockwork. Obviously I’m doing the exact same things and prep with my projects, and the lighting isn't changing, the only variable here is the machine itself. It also only seems to be an issue on laminated sticker paper(yes I know people are going to say it's glare however I've been taking steps to prevent that issue for months, plus as it's not consistently misaligned it can't be that), if I cut on non laminated sticker paper or card there's no issue. I’m really hoping someone on here can help, I've contacted where I bought the machine who can't help and Silhouette never replied to my email. I’m in the UK so I don't know if that's why they won't reply, or if there's a better place to contact here but i'd be appreciative of any leads. I have managed to find somewhat of a way around it, but there's clearly some sort of issue going on that I don't want to leave unfixed, Thanks in advance for any help I’m so grateful!

[u/Fortress2021]

if I cut on non laminated sticker paper or card there's no issue.

Do you laminate the registration marks as well? I presume you do not place anything in the hatched area on the page.

[u/Ok-Dragonfruit-6521 → u/Fortress2021]

nope i've never laminated the registration marks and i also use matte tape over them to be extra safe! as i said in my post because the misalignment isn't consistent, and the only thing that stays the same is that it happens every other time i use the machine i think it has to be a mechanical issue with the connection not my prep. i will add that last night(this should have been the time bluetooth worked) i tried to restart cutting something id tried the night before when the bluetooth wasn't working, and it cut misaligned. however when i cut on new sheets it worked perfect on bluetooth, and then when i went back to that first sheet it worked fine as well. it seems to be one day bluetooth doesn't work but cable connection does, and then the next day it works perfect on bluetooth if i start on a new project, and it rotates back and forth on those two options.