Good news! I couldn't reproduce this issue on macOS 26 beta 4 (25A5316i), so it may have been fixed. However, since there was a previous version where I also couldn’t reproduce the issue but it turned out not to be fixed, it's better to observe a few more upcoming versions.

Found another bug. If you restart Mac after allow LNP, the LNP of APP will not working. It turns out that someone discovered this problem quite early on, and as of April 2025, this problem still remains unresolved. I submitted this problem with TSI (Case-ID: 12458183) and FB16931542, but so far I haven't received any response.

still unfixed on 15.4 Beta 24E5238a