Issue with Storyline projects not staying in the centre of the screen on WordPress website.

Hi,

I have mentioned this problem before and a solution was suggested. However the solution doesn't always work and is not effective.

I upload the completed projects into my WordPress website using the IFrame option. (see attached image)

When I try to progress through the project, the project doesn't stay in the centre of the screen.  The solution suggested previously was to reduce the page's magnification.  This sometimes works, but sometimes doesn't, and is not really efficient. (see attached video)

I'd be grateful if someone could help me find a more effective way of keeping the project centre-screen please.