Text input fields behaved strangely in jammr 1.2.7 on macOS by beeping or sending an empty line in the chat after every message. There is now a beta release that aims to fix this issue.

Try the jammr 1.2.8-rc1 beta release for macOS if you're feeling adventurous.

Warning: This is a beta release and may not work as well as the current stable release. Roll back to the stable release at any time simply by downloading and installing jammr again.

When you start the beta a dialog will ask if you want to install the current stable version. Say “no” to that dialog.

Mac: https://jammr.net/static/1.2.8-rc1/jammr.dmg