iOS users experiencing freezing and slow performance on Unsen theme (v1.9.3.1)

Technical Q&A
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1

iOS users are experiencing freezing and slow performance on our store using Unsen theme (v1.9.3.1).

The issue mainly happens on iPhones, especially on Safari. Desktop and Android work fine.

Has anyone faced similar iOS performance issues with this theme or knows where to investigate?

4

Its a paid theme from Themeforest, their support seem to be active.
Have you reached to them?

Their demo store works fine on IOS devices I have; If you share a link to your store I can look at it as well…

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www.cocopellii.com - This is my website. Can you take a look at it?

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Hi Cocopelli, i only use the Macbook for making changes to the store. Also because the shopify app is not working on my Iphone (lphone 17 pro max) and support questions for the Shopify App go unanswered.

My experience is that after 2 hours of working browser history cleansing and sometimes restarting helps. Though this is annoying, especially when while you’re in the midst of an update, the system starts to ‘turtle’ i can press a key, run a bath, and then it will accept the next input. clearing cache and switching off is sometimes helpfull. Support question get replies like, did you check your network connection, maybe it is your internet provider… which is assuming everyone is as blond as the next person. Having the fastest internet available and all set up correctly. Though what i do now, i check if there is a message like this: Some POS-only staff accounts are being marked as inactive -

the above started at least on the 14th, probably earlier, i can see it in my settings as well, inspite of support saying there is no outage. Now, when system starts ‘turtling (not performing)’ i stop. working on essential or critical actions, as they will keep coming back with faulty input. No solution, just my experience.

7

Looked at your site and mostly it is fine.
There are 2 points I’d like to make:

  1. Your homepage has 7 background videos. They load and play all at once in parallel. This, obviously eats up bandwidth, memory and CPU.
    Ideally, playback should pause when video is not visible and resume when it is.
    Unfortunately, this does not happen, so I’d recommend to reduce the number of videos.

  2. The free Whatsapp button app is badly written. On every resize event it re-draws its button and this can cause bad performance, especially on mobile with auto-rotate feature. This causes freezes.

    You can easily test it yourself on your desktop – simply resize your browser window several times quickly and see how site freezes.
    Then disable the Whatapp button app and try the same – no freezes.
    (at least that’s what happens on my devices)