Callbacks not working on widget v3.13.0

Hi all, found a glaring issue with the new widget v3.13 release, please see the details below 👇 

### Problem
- widget callbacks not working on v3.13.0
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### Environment
 - version: 3.13.0
 - dev tooling: next 15 / vite 7
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### Callbacks affected:
- `onTransactionComplete`
- `onTransactionSignRequested`

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### Current solution
Revert back to widget v3.12.10