[BUG] Child nodes in the `brazil3` instance take too long to solve

[nguidotti]

In the brazil3 instance, the LP of the child nodes take too long to solve (more than 10min) despite the root node taking only a couple seconds. We should investigate why this is the case.

[github-actions]

🔔 Hi @anandhkb @nguidotti, this issue has had no activity for 21 days. Please update or let us know if it can be closed. Thank you!

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[chris-maes]

Moving this to 26.02.

[github-actions]

🔔 Hi @anandhkb @nguidotti, this issue has had no activity for 21 days. Please update or let us know if it can be closed. Thank you!

If this is an "epic" issue, then please add the "epic" label to this issue.
If it is a PR and not ready for review, then please convert this to draft.
If you just want to switch off this notification, then use the "skip inactivity reminder" label.