Try remaking your forwarders and update the forwarder pack.
If the issue persists, delete the first DSiWare title installed, and see what happens when reproducing the issue.
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.
If the issue persists, delete the first DSiWare title installed, and see what happens when reproducing the issue.