As you well know, Nintendo Switch updates usually include bug fixes present in the console. However, sometimes they also introduce other problems, as has happened in the latest version of the platform.
As we have learned, since version 12.0 of Nintendo Switch there is an exploit related to the screenshot transfer function. Recall that this feature was included in a relatively recent version, and now seems to have led to this problem.
Nintendo has already been alerted to this bug, so it is expected to be fixed soon through a new update. We will be watching to see when it is released.