Clone Stamp Tool + Paint on Transparency

When using the Clone Stamp Tool and enabling Paint on Transparency, the whole layer becomes transparent. I've seen a few threads elsewhere about this but the proposed solutions are time consuming and don't always work.

Reproducing the problem:

1. Use the Clone Stamp Tool on any footage
2. Enable Paint on Transparency

Result: The entire layer becomes transparent

Expected Results: The cloned area remains opaque and the rest of the layer becomes transparent

My Workaround:

1. Duplicate the painted layer
2. Enable Paint on Transparency on the top layer
3. Use the top layer as a matte for the bottom layer

With the Workaround: The top layer maintains the alpha of the original paint, so it cuts out the painted area like a matte normally does. This is not ideal because those steps have to be deleted and repeated everytime you want to tweak/add to the clone.

This has been happening for many years and persists in the latest version of AE.

Other Threads about this:

Adobe, Reddit1, Reddit2