I have not tested it on any of the ARM64 machines but the program itself it shouldn't leak memory. This is likely one of system thumbnail/preview handlers.
Due to way of these work, they get loaded into the calling process (OC) and then whatever memory they don't clear, become the bloat contributed to calling process (OC).
That is hard to find, but with something like
https://www.nirsoft.net/utils/shexview.html you could disable some handlers, or notice which filetypes you preview or view thumbnails from. Most likely some picture viewer you have has replaced system image preview/codec.