Mini oneboxing doesn't preview for encoding slug generation method

when slug generation method is on encoded, the mini oneboxing preview is not shown correctly:

This is a topic with encoded slug generation, تربیت گذشته و حال من درباره غذای باقیمونده در سفره - ایستگاه پرسش - پادپُرس

this is the same topic after I changed the slug generation to ascii:

should it be like this? as one may think it is not working.


It seems that Excon.public_send(@http_verb, ...) return 404.
Oneboxing, for example, this file: also don’t work.
May be some request headers wrong, or some additional properties need to set for Excon?

What do you think here @sam?

I think its a bug, we should fix it.