I really like the ctrl+left click feature as a feature for selecting objects on a grouped layer, but from Affinity Photo v1, sometimes I experience problems when I press the shortcut ctrl+left click, the objects I click with these shortcuts often become duplicates, even though I'm not dragging the left click button. I thought in V2 there would be a fix, but apparently I'm still having this problem.
I've found a post on this forum in 2016, someone has asked but there's no solution yet, so I'm making a similar post again... more or less the problems I'm experiencing are the same as the posts on this page:
https://forum.affinity.serif.com/index.php?/topic/30513-ctrl-clickdrag-selectcopy-in-affinity-designer/