Unmounting components results goes wrong when a partial payment is successfully completed

[Kwok-he-Chu]

To reproduce:

1. Go to Gift Card Component
2. Click continue
3. Click Redeem gift card
4. Click Go back
5. Click iDeal or click Credit or debit card and go back
6. Click Redeem gift card
7. Enter a success scenario where you enter a valid gift card
8. When returning to the initial screen, the iDeal or Credit or debit card components are still mounted

Expected behavior
When returning to the initial screen, using the flow above, the iDeal or Credit or debit card components should not be mounted (only the buttons should be visible, not the 'payment screen' aka mounted component)