Accidently booted sysNAND with a custom theme without internet, will my Switch get banned?

Hey, I just booted my modded Switch into the sysNAND accidently. Airplane mode was on (no internet connection) and I had DNS MITM and Exosphere set up. However, a custom theme which I set up in my emuNand was still applied and I heard that my Switch will get banned if I use the sysNand with a custom theme. However, it wasn't connected to the internet. Are there any traces left that will get me banned? Will my switch get banned if I boot the OFW (without CFW) and enable the internet connection to play online? Or is it safe because the sysNand wasn't connected to the internet?