In Firefox:

In the RTE, type "{chee"

using the arrow keys scroll down and hit enter at the macro selection for "cheese"

this opens the macro browser

hit enter to insert the cheese macro

Results: instead on inserting the cheese macro, a line feed appears on the screen behind the macro browser.

In Safari, follow the same steps

Results: the cheese macro is inserted, but the cursor has vanished. It should be next to the closing bracket of the cheese macro.