At least for me "Military bunker" is something that would be a match for "Bunker".
There is a separate icon but this way it would be harder to make this kind of mistake.
I see this:

It seems pretty ok to me.. Are you seeing something different?
On https://preview.ideditor.com/master/#background=Bing&disable_features=boundaries I see

Turns out this was translated to "Bunker" in the British English localization. I changed it to "Golf Bunker".
https://www.transifex.com/openstreetmap/id-editor/translate/#en_GB/presets/19250911?q=text%3Atrap
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Turns out this was translated to "Bunker" in the British English localization. I changed it to "Golf Bunker".
https://www.transifex.com/openstreetmap/id-editor/translate/#en_GB/presets/19250911?q=text%3Atrap