MaciejK wrote:Resolution of every panorama on my site is at least ~90MP so it means should be multi resolution or I’m wrong? On my 13” MacBook Pro when zooming i’m getting some 3 levels of detal and no any issues.
This is non-retina macbook? The panorama will start at the "level" that "satisfies" the screen resolution. On my macbook 13" pro retina (2560 x 1600), there is some zoom threshold, but it already starts at the most zoomed level (to satisfy screen resolution). The max zoom will then be the calculated pixel-level. In other words, on my macbook retina, I only see one level (the max level). On your iPad, which you are probably holding vertically, the panorama must adjust to the HEIGHT which may be 2048, and may provide no zoom.
I can't give you the full logic of how pixels work, but you need to take in mind that although your panorama is massive, it's distributed as a partial "view" on very large screens, which is often limited by screen height (panorama is ultra-wide). It's normal to have less zoom on vertical devices, because the wide panorama will get limited by the height.
MaciejK wrote:Also checked right now on my iPhone SE 2020 running iOs 14.4 and zooming works just great.
Logically because the screen is smaller.
As mentioned, I can't speak for the "flashing", and it seems strange that the browser would zoom. Even if there is no zoom, I would have hoped that
Marzipano blocks default browser zoom in behavior, but it could be this is limited on older OS.