Slash symbol disappears when in Opentype and Preview

When trying to kern forward slash, it disappears when you enter anything after it in Open Type Designer and Preview. When the font is exported and installed it works but it doesn’t work inside FC. It does work in the "test TTF OTF. Not a major bug, but a curious one. Has anyone else come across this problem?

Thanks,

Jonne

It’s not a bug. When typing in the Preview toolbar a forward slash is used as an escape code. Look at the glyph names in the bottom line of the Preview Toolbar
Escape Characters.png

You need to escape your slash by preceding it with another slash:

//

The / character is used as an escape character, which interprets the characters following it as glyph name.
slash.png