100% CPU consumption with using Howdy with vsftpd

[Silverbullet069]

Behavior

Howdy, folks. I'm having a serious issue regarding using Howdy with vsftpd

I've setup my FTP server according to this guide: https://www.makeuseof.com/install-ubuntu-ftp-server/
When it comes to login, there is an error message about OpenBLAS:

After I made some research, it seems this error comes from some Python libs, but I don't know what services ran Python code since it is not vsftpd?

Then my fan suddenly ran full speed so I noticed the unexpected high CPU consumption caused by 3 "compare.py" processes originally from Howdy:
NOTE: this is only happened after I typed the password

When I exit FTP prompt, another error shown up:

After exited, the processes was still running

I tried to make another FTP login, it became worse: 3 more Howdy processes sprung up, along with 3 existed Howdy processes:

Hypothesis

3 processes run "compare.py", I think when vsftpd did the auth step, although it's a password auth, Howdy still ran along but didn't really do anything (no flash IR camera after I typed the password)

Solution

Disable Howdy, and everything worked.


But I loved this app, so I tried to disable Howdy ONLY for the FTP user

Attempting better solution

Luckily, Howdy has -U --user option that allow per-user configuration, but it's not working as I thought. When I ran:
sudo howdy -U silverbullet069_ftp disable 1 (silverbullet069_ftp is my FTP user)
It also disables Howdy at my main account (which is silverbullet069)

I tried to play a little by specifying an unknown user account, like silverbullet069_unknown, surprisingly the command still worked?
Or did I mistakenly use this option?

Can somebody fix this issue for me, thank you.

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I've searched for similar issues already, and my issue has not been reported yet.

Linux distribution (if applicable): Ubuntu 22.04 LTS, Wayland, GNOME Shell 42.9

Howdy version (sudo howdy version): 2.6.1