Not always able to select text via shift+cursors (Notes under Sequoia)

I have from time to time issues when selecting text inside a note written with macOS Notes. I have Sequoia. The issue presents itself when I have a itemised list only. I place the cursor where I want to copy from and keep the shift-key pressed and press down-cursor, I find I can select only some lines, then I arrive at one and cannot go beyond. If I want to proceed, I have to use shift right-cursor and then I can go further. It seems that the same problem might not be present (or not present as frequently) when selecting 'backwards' (from the bottom of the region to select upwards). The issue is present in more than one note. How can I fix this?