I just tried with an iphone SE, ipad mini, huawei tab (chrome) and huawei P10 mobile (chrome) but they all work exactly the same for me.
Can you attach a screencap of the issue, and aside from ipad, which mobile devices and browsers are not working? I'm not able to re-create the issue for some reason.
Please note that due to the market dominance, only the mobile chrome browser is fully supported.
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