Lately, I am only able to open one photo in Pixelmator Pro through Photos ("edit with") before I encounter performance issues. If I attempt to save the edits I've made in PP, I get a "Not saved" message and if I attempt to open a second photo through Photos, the spinning beach ball appears and I have no choice but to force quit PP. These issues have been consistently happening every time I use PP over the past week.
Any assistance would be greatly appreciated.
I have Version 1.6.4 of Pixelmator Pro and a 2018 MBP running Catalina 10.15.5.