Boolean operations glitch?

Branching Bugs
1

Boolean operations glitch ?
I have a bug when I try to do a boolean operation, my objects disappear. The objects that disappear are not the same according to their position in the group.
Here is an illustration:

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the link of the project: https://www.figma.com/file/WC39yow0HAs9sGQxTO2poi/logo-ABWR-coller?node-id=3%3A2&t=afXfgX57A22mkfe9-1