As I said and showed, I used two different window sizes on PC to show that it isn’t because of poor UI scaling techniques. For scaling UI, I don’t use offset at all.
This isn’t just a mobile bug, its all of Roblox. Any resolution other than the one you made it on will be like this, because UI Caching isn’t working. Its a Roblox bug thats been happening for a few weeks now, theres more info about it on the ScreenGui API:
This bug has been happening to me not only in studio, but also constantly when im playing casual games. Ive tried adjusting the scale using plugins and manually in the scale values, but to no avail. It seems to happen more frequently on my mobile device
I am also having this issue. Centered style TextLabels with (0.5,0.5) Anchor and (0.5,0,0.5,0) Position are occurring fine on Desktop but offset towards the left on mobile.
The plug-in post specifically says not to do that. Even when doing it the results are the same. This plugin does not solve the issue so stop suggesting it. All it does it make the text smaller without solving the issue of it being off-center.