Hello!
It seems that this year, no bugs for Bug Catching have been showing up for me. I did not have this issue last year. I have been on Blue Mountain Swallowtail Butterfly ever since it began, and have searched everywhere I could think to check.
I am playing on Microsoft Edge 84.0.522.52 (Official build) (64-bit), on Windows 10 Home Edition. Last year, I believe I was using Chrome or Firefox.
I'm wondering if maybe you have been "searching" for this bug since the last time bug catching was active, and maybe you found it long ago and never actually turned it in? Since Blue Mountain Swallowtail Butterfly is one of the old bugs and in my experience, if you're all caught up on bugs, the new ones always show up first before you're asked for repeats. Otherwise, sometimes random floaters do take a frustratingly long time to show up, but usually bugs appear pretty fast. Often they show up on the very next page when I click the button to start hunting for a bug.
It let me turn in the one you sent me, so hopefully tomorrow it will be fixed! I will report here what happens just in case others have the same problem.
Thank you very much for your help!