Unable to book arround blackout times

[PECgonzalezi]

[x]: This is a bug and not a question.

[x]: I understand that the best way to resolve this issue is to solve it and propose a Pull Request.

Describe the bug**

To Reproduce**

Steps to reproduce the behavior:

1. Go to 'Application management' / 'Blackout Times'.
2. Set a Blackout time bigger than 1 day. For example from 1/04/2026 00:30 to 12/04/2026 23:30
3. Select the resource and reason.
4. Does not repeat.
5. Go to 'Schedule' 'Bookings'.

Expected behavior**

If none of the Blackout period is shown in the calendar, it works and you can book.
If the full period shown in the calendar is a blackout, it works.
If the shown period has available and blackout days, it stucks in "Loading reservations" and you can't book the available days.
If you go to next week (completely available) it works again.

The problem appears the week that has some days affected by a blackout period and some days available.

Screenshots**

Specifications

Tested in v4.0.0 and v4.2.0 installed in mariadb v10.6.13 in a docker stack.
Tested in Edge and Chrome.