Game actors in array are not following instructions in For Each Loop. (Activate and Deactivate Issues)

Development Programming & Scripting Blueprint
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There is the picture, in better quality.

Screen Shot 2022-03-14 at 11.40.48 AM
Screen Shot 2022-03-14 at 11.40.48 AM1920×349 51.9 KB

Wouldn’t doing ForEach loops like that be costly?