Hi,
two avid mediacomposer pc with v 2018.1 with same problem. Since this version it's impossible to create title, not with title tool and not with marquee. Both tools can't save to bin successfully. Title tool simple empty the title windows, I lose my create title. With marquee tools I can save local in the tool, but I can't save to bin.
I reinstalled v8.10, this version works without problems.
Joerg