I'm sorry to make you not happy. I'm here just want a fix, not a workaround:
Is 192.168.1.100 a part of LAN net? YES
Is my firewall rule defined wrong: Allowing OPT access all interfaces except LAN? NO
Should 192.168.1.100 be blocked by the rule: YES, BUT its not blocking anymore.
Again, I'm sorry made you feel so angry. but thats the issue I'm having. The rule was working perfectly until I installed your package, so of course, I need to ask you about this first, if you think its not your package issue, then I will ask pfSense teams.