One thing you could also try quickly is doing a 'force rebuild'... (the arrow next to Preview Course)
Hi Matt, thanks again for the advice. I've tried the solutions provided but sadly not having any luck unfortunately.
I have tested further using other browsers on Mobile decives and it appears to only be an issue when using the Google Chrome browser for mobile.
Will get this logged on GitHub now and hopefully it's something that can be replicated and rectified shortly.