Why a signal that is blocked not shown up in SigPnd of /proc/pid/status when it is sent

**Fact** 1. A signal may be blocked, which means that it will not be delivered until it is later unblocked. Between the time when it is generated and when it is delivered a signal is said to be pending. [Manpage](https://man7.org/linux/man-pages/man7/signal.7.html) 2. SigPnd (in /proc/pid/status): Mask (expressed in hexadecimal) of signals pending for thread and for process as a whole [Manpage](https://man7.org/linux/man-pages/man5/proc_pid_status.5.html) ==> So if a signal is being blocked by a process and I send the signal to that process, that signal is "pending" and should show up in SigPnd. **Situation** I blocked a signal, say SIGUSR2, with sigprocmask. This is the result of /proc/pid/status

SigQ:   0/21148
SigPnd: 0000000000000000
SigBlk: 0000000000000aec
SigIgn: 0000000000000200
SigCgt: 0000000000000000

SigBlk shows that SIGUSR2 is being Then I send SIGUSR2 with kill **Expectation** SigPnd: 0000000000000aec because SIGUSR2 is being blocked so it is not delivered (aka pending) **Reality** SigPnd: 0000000000000000 **Question** Why SigPnd does not show up as my expectation?