Hopefully this is the last message!!
I cleared the browser cache and removed the additional CSS code after a couple of hours and the animations are working as they should whist on WPBakery 6.10.0. All I can think is that some caching is taking place and that wqas impacting the upgrade, anyway all working correctly now.
Thank you so much for your support and suggestions, it has made a big difference.
I will reintroduce W3 caching plugin at some point after testing on the staging site as it did speed up the site.
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