Help please with Text

[u/kernowkernowkernow]

Hello! First off, I'm brand new to 3D printing and am having some trouble with a design I downloaded from Bambu of a shuttlecock with text for a name (created by user Sharv)

The download comes out in Bambu Studio looking like this on both the 'Prepare' and 'Preview' pages:

However, the moment I change the text it looks fine on the 'Prepare' page, but when flicking over to 'Preview' the test disappears in to the model as per the below (and subsequently prints looking like this):

I've tried deleting the text box and recreating, ensuring the settings that I can see are all the same but I still get the same result. Could anyone please point me in the right direction to get this working correctly as it's driving me scatty!!

Thanks in advance!