If your site is being cached then sometimes this can make it seem like data is not being saved to the database. This will exhibit itself as:
- You create or edit a redirect and nothing changes
- You try and install or upgrade Redirection and it complains about a loop
Both of these problems are almost certainly caused by an aggressive caching system. If you flush or disable your cache then it usually fixes the problem.
Some common solutions are:
- SiteGround – this has a Memcache option which needs clearing