Let me start by saying that during Travel Day, the capacity offered by your accommodation wasn't duplicated.
Leaving aside what I don't know if it's a bug or just the suitcase being duplicated:
I don't know how, but after those days, I was able to bring even more items. I initially thought it was the Torn time zone (since I'm located in Italy), but then I noticed it happened again, much later. Obviously, I wasn't able to replicate that bug, but I did notice that since I use a laptop that goes back and forth between home and office, when I change connections, if I'm in the middle of takeoff/landing or something similar, and the page doesn't refresh properly, I know I was able to bring more.
This hasn't happened since when I change connections, a cloud check appears to verify if I'm a bot. I should add that I obviously didn't abuse the bug (also because, for the love of science and to collect data and the potential reward of finding bugs XD), I tried running various tests again, including installing plugins that check my PC's various connection logs.
Now I no longer have that plugin, as I don't believe it's secure for my privacy. I simply noticed that if I changed connections (office/home or vice versa), some data was lost, which doesn't happen now.
I remain available for any profile checks and any other information or tests.