So, I putted two insects in my inventory that I was going to donate to the Museum. On my way through there, I saw an insect, and decided to catch it, and when I did, It appeared as I catched two of them in my inventory. But then I saw that one of the insects that I was going to donate was gone. It's like when I catched the bug, one of them replaced the one that I was going to donate It to the Museum.
It happened with me two times, the first one I thought I had sold by accident. However, in this second time, I discovered this bug.
Sorry, I couldn't get screenshots or a vídeo. I'm playing on Playstation 5.
P.S: Just to be clear, I don't have the perk/skill to catch two bugs in the "Catch" Skill Tree.