Corrections don’t always mean you are wrong.
It could be that you’re not clear, or that you’ve not considered something, or that you could use something extra in your thesis. But they don’t always mean you’re wrong. They’re very rarely connected with even a hint of failure.
And if you’re asked to do something because something is wrong in your thesis, you now have the chance to make it right or make it better. Fantastic! (it might take time and work – which has consequences – but now it can be right)
Corrections and amendments to your thesis are part of the thesis examination process. Vivas and corrections aren’t about finding fault for the sake of it.