Deleting space after reference number

Hello,

I couldn't find information on this. There is a spurious space inserted after the reference number in certain numbered styles (IEEE,Nature,NLM) in the bibliography field but not in the citations. It is not coded in the CLS syntax for these styles and happens when you use

<option name="second-field-align" value="******"/>

but not when you use

<option name="hanging-indent" value="true"/> or <option name="second-field-align" value=""/>

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