Applications forget setting in every boot
It could be a manufacturing fault in your particular tablet, but it sounds more likely to be an error in that model. Perhaps the system integrator didn't put applications' data on non-volatile storage, or screwed up the shutdown sequence. If this is the case, updating the system may fix the problem. Check with the manufacturer.

If you edit your question to include the make model name of the tablet, you may find someone else who has one and can help.