I am not sure if this is a bug, some transmission error or intended behavior so I decided to post it here to discuss how to investigate it better.
There is a post tagged with several tags among which are #internet #lang-ru #lang_ru. If I search them on my pod I will discover the post with all the tags except #lang_ru.
Same with another pod diasp.org: #internet #lang-ru #lang_ru - it is not discoverable with #lang_ru tag but is with others.
But if we take different post with similar set of tags: #lang_ru #lang-ru #HandsOffVenezuela - it is discoverable by all of them. So it doesn’t look like this is global behavior.
Any ideas? #lang_ru is used as main tag to mark entries in Russian language so it would be nice to be sure there is no problem with it.