Do you know how often this happens? Because the brick risks only happen when installing or uninstalling Unlaunch, and in rare cases, normal usage of the DSi.
v27.3.3 (Final hotfix, hopefully)
What's new?
The SD card checking feature has been removed, as it is not possible to perfectly detect a bad SD card via CID.
Sounds to me like the SD card is dying, because the DSi Sound app shouldn't be corrupting your SD card.
Follow this guide to reformat and check for errors: https://dsi.cfw.guide/sd-card-setup.html
If you tried updating using Universal-Updater, that does not work, as of currently. Please use the manual method instead. (EDIT: Should be fixed as of v27.3.2)
If the issue persists, delete TWiLight Menu++ from the FBI title list, and try installing again. If the issue still persists, please...
Caller -"Everytime I start a Pc game on my S24, playing on a external monitor, someone calls or texts me, n it kicks me out of the game." Customer Support - Click (hangs up)
I found it funny cause many many years ago, had a roommate in college that did this same dumbass branding of the school logo, but it didn't look anything like it after it healed. Just looked like a birthmark.