Embark exported buffer closes when you close minibuffer

### I confirm that...

- [X] I have searched the [issue tracker](https://github.com/doomemacs/doomemacs/issues), [documentation](https://docs.doomemacs.org), [FAQ](https://docs.doomemacs.org/-/faq), [Discourse](https://discourse.doomemacs.org), and [Google](https://google.com), in case this issue has already been reported/resolved.

- [X] I have read "[How to Debug Issues](https://doomemacs.org/d/how2debug)", and will use it to provide as much information about this issue as possible.

- [X] The issue can be reproduced on the **latest** available commit of Doom.

- [X] The issue can be reproduced on a stable release of Emacs, such as 27, 28, or 29. *(Unstable versions end in .50, .60, or .9x)*

### Expected behavior

Exported grep buffer should persist after closing minibuffer search

### Current behavior

Exported grep buffer disappears after closing minibuffer search

### Steps to reproduce

1. Search project / buffer
2. `C-l` to `embark-collect`
3. `m` to mark a bunch of results
4. `SPC a E` to export selected
5. Focus shifts to the exported buffer but the minibuffer is still open.
6. Navigate cursor to the minibuffer and press `ESC`
7. Exported grep buffer disappears along with minibuffer search

### System Information

https://gist.github.com/rakanalh/b1acccc4f76f60744125f8bc42bddfd0