I would assume you tried to change pass for an already banned account most likely.
This!! you got it right. check out the dates shown on bpip logs Quote from: https://bpip.org/profile.aspx?p=lega46141
3/3/2019 8:45:04 AM password reset via email
2/13/2019 8:59:16 PM Changed to Archived status Autoban user
password reset was done on march 3rd, 2/13/2019 8:59:16 PM Changed to Archived status Autoban user
while the account was banned a month earlier on february 13th
so I'm pretty sure you were NOT banned for trying to change password
The most nearest case would be OP clicking on the lock account link in the password recovery email mistakenly. 
I don't think so, I think a locked account won't be shown on any public logs bpip scraped data from seclog and modlog, autoban was on modlog
so I'm pretty sure he has broken a rule, plagiarism, spam or ban evasion, that made him get banned by mod