Swift dot method suggestion frequently doesn't work Follow

I'm frequently having problems in my swift 3 project where AppCode is not providing me a list of methods when I reach the dot on a variable

Today it's not working on a UITableView where once I type tableView. nothing appears anywhere I try in the file.

It seems to be completely random, but unless it's something simple like tableView.reloadData I need to switch to Xcode to complete it.  It's really frustrating.  Why is this happening?