The Healing Brush, Patch, Blemish Removal and Inpainting Tools will not work after I apply a layer. For example, I attempted to use the Frequency Separation as outlined in the Affinity tutorial: https://affinity.serif.com/en-us/tutorials/photo/
As soon as I applied the Frequency Separation Filter, however, the tools would not work. I followed the instructions to the letter and every time I added a layer the tools stopped working. I had the same issue whenever I opened and worked with other layers. The tools only worked if I used them on my photo before opening any layers.
What am I missing or doing wrong?