Thanks for letting us know here your experience after the recent updates on your beloved Samsung Galaxy device having issues with the Samsung Keyboard Theme that kept changing to default. I feel and understand why you are frustrated for a device that you've take care so much expecting it to perform better after an update. If my device is facing similar experience, I will be frustrated too.
Before you try out the below recommendations as to your solution, be sure to check if your device's softwareis updated with the latest version. Please check how to update your mobile device's software in the following order.
Step 1. Go to Settings > Software update.
Step 2. Tap on Download and install.
Step 3. Follow the on-screen instructions.
If that doesn't solve the issue, you may submit an error report through the Samsung Membersapp as follows:
Step 1.Launch the Samsung Members app, and then tap the Support icon for more options.
Step 2. Scroll and select Error reports.
Step 3. Choose a category of your concern. Select"Settings/System".
Step 4. Choose the frequency of the issue you are experiencing. Enter issue details or attach a video or screenshot. Then press Send icons to complete the report.
