Whenever i create a category in Add new post then publish it. And when i refresh the page or after a day or two again create a new post. that category i created earlier goes away.
This is really frustrating. isn’t there a permanent way to keep categories to MainWP?
When creating a new post, check the appropriate Child site in the metabox on the right.
After you do that, the Select Categories dropdown will be populated with all existing categories on that Child site.
Even with the ones that were not created through MainWP.