There aren't security issues with 1Password really, but there are other issues, mostly around the company AgileBits. From my other comment on this thread:

These days AgileBits(the 1password people) are doing everything they can to get everyone onto a subscription plan, and are breaking local vaults slowly. Most people don't seem to recommend it anymore.

The only security issue really is the online vault(which isn't a security issue per-say, but is a security weakness since your passwords are no longer under your direct control). This may or may not be an issue for you, depending on your security posture.