It is a known bug and we get threads everyday starting just like yours LOL.
Most of us are running older versions as every update is a beta version until the bugs are worked out and then a prior release will be called a stable release. No need to stay up to date unless it is adding something you want or you are ok with the bugs...
Almost every recent update since 5.6.x.x. has had issues, so just be prepared for issues if you prefer to stay up to date! And then search here for those that are running the version before you to see what the bugs and fixes are...