[SOLVED]Posts missing in Community view

For some communities, I cannot see some recent posts.
I find them in Local or All tab but when I click on the community, it disappears. Sometimes, I miss weeks of posts! I removed all blocked communities and instances just in case.

Is this a known issue?

Edit: I also checked the Mark read/Hide setting. Everything was unchecked and I tried disabling hiding in communities with no success.

Edit 2: Fixed! There is setting on the web interface to "Show read posts", I left it unchecked.

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Here is an example :

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