With urxvt: unable to prevent title in title bar from being overwritten

I'm using urxvt version 9.22 under Ubuntu 20.04.1. Even though I use -title MYTITLE on the urxvt command line, and even though I set the following Xresource ... URxvt.insecure: false ... the title in the titlebar still gets overwritten if any command that is run within urxvt sends out the appropriate title-change escape sequence. Is there any way in urxvt to specify that -title specified on the command line will never be able to be overwritten via any escape sequence? Thank you in advance for any thoughts and ideas.