Is it possible to do that? Automatically turn off predictive text when I'm using Secure Folder?
If not, I would recommend adding this feature. Secure Folder is supposed to be a separate secure area, but right now anything you type can "leak" to the regular phone because the keyboard remembers it for predictive text.
I went ahead and experimented with the Samsung keyboard's predictive texting. Even though you can't turn off predictive texting within the secure folder while having it enabled outside, I can confirm that anything you type outside of the secure folder will still be predicted within the secure folder. However, predictive texting will not be carried outside of the secure folder