“slide-out” navigation buttons no longer function

“slide-out” navigation buttons no longer function after installation of Directory Opus 12.15 build 7102
Is there a solution for this bug ?

Confirmed, this accidentally got broken in beta 12.14.1. We'll restore it in the next update.
In the meantime, you can make it work now by setting the delay to 0 ms.

(Also as Leo says, this feature is going to be removed in the future).

The latest beta is out now and has the fix for this.