Bing has subdomains their search is also running on:
We should add {}.bing.com in both cases to search engine definition: [https://github.com/piwik/piwik/blob/master/core/DataFiles/SearchEngines.php#L204]
(In [4372]) fixes #2284
That change only handles the "normal" search, am i right? Subdomains for the image search might be counted as bing instead of bing images.
(In [4375]) refs #2284 - quite right; though I could have sworn I saw it redirect to www.bing.com/images earlier