Hi, I have a custom base for permalinks:
It happens, that sometimes the category links from the menu of the front end give 404, even if they report correctly "sections" in front of them.
To fix this I have to go to wp-admin>Permalink and click "save changes".
At this point category links start to work again.
Do you any idea who or what could be causing this? Disabling plugins cant do because I don't know when it could happen, maybe tomorrow or in a week.