When I visit a Flow page with two posts by the same user and I have already thanked both of these posts, I see two API requests for `list=users&usprop=gender` for the same user.
Stack trace of these API requests:
```
jQuery.ajaxTransport.send @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:140
jQuery.extend.ajax @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:134
mw.Api.ajax @ load.php?debug=false&lang=en&modules=ext.echo.base%2Coverlay|ext.echo.overlay.init|ext.eventLogging…:274
mw.Api.get @ load.php?debug=false&lang=en&modules=ext.echo.base%2Coverlay|ext.echo.overlay.init|ext.eventLogging…:273
mw.thanks.getUserGender @ load.php?debug=false&lang=en&modules=ext.echo.base%2Coverlay|ext.echo.overlay.init|ext.eventLogging…:81
(anonymous function) @ load.php?debug=false&lang=en&modules=ext.echo.base%2Coverlay|ext.echo.overlay.init|ext.eventLogging…:236
jQuery.extend.each @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:5
jQuery.fn.jQuery.each @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:2
reloadThankedState @ load.php?debug=false&lang=en&modules=ext.echo.base%2Coverlay|ext.echo.overlay.init|ext.eventLogging…:236
(anonymous function) @ load.php?debug=false&lang=en&modules=ext.echo.base%2Coverlay|ext.echo.overlay.init|ext.eventLogging…:237
mw.loader.implement.thanks-button-thanked @ load.php?debug=false&lang=en&modules=ext.echo.base%2Coverlay|ext.echo.overlay.init|ext.eventLogging…:237
runScript @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:162
mw.loader.checkCssHandles @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:163
execute @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:164
handlePending @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:161
runScript @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:162
mw.loader.checkCssHandles @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:163
execute @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:164
handlePending @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:161
runScript @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:162
mw.loader.checkCssHandles @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:163
execute @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:164
handlePending @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:161
runScript @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:162
mw.loader.checkCssHandles @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:163
execute @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:164
handlePending @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:161
runScript @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:162
mw.loader.checkCssHandles @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:163
execute @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:164
mw.loader.implement @ load.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=wt%2Fyo6SB:170
(anonymous function) @ load.php?debug=false&lang=en&modules=ext.echo.base%2Coverlay|ext.echo.overlay.init|ext.eventLogging…:312
```