Many apologies to find you in this trouble.
However, would you mind sharing your 2018 version .muse file with (only the problematic page) us so that we can investigate and try fixing it?
For sharing the file you can follow the steps explained here - https://forums.adobe.com/docs/DOC-8652 and share the link with us.
Please see link here. This is a different site with the same problem. The pages that play up are home, about and spend to name a few. Oddly there are a couple of pages that work ok so i'm interested to let you guys find the issue. I do use 3rd party widgets from muse themes but they have worked fine up to now and its only within chrome on mobile. The B master is a duplicate of the shop master which works fine. All i did was remove the ecwid widget and leave everything else the same but the problem still crops up. I looked at the elements and page setup within the porblematic pages but can't find anything out of sorts. Had to roll back to the 2017 version which is used for the current live site.
Looks like the Onload animator widget is one causing the issue.
I tried removing them and it went fine.
Maybe it requires an update, can you please check with the MuseThemes once.
Great stuff thanks Ankush - will get on to them