I only have Telegram, Twitter, Keep Notes, Groove Coaster, Mario Kart, Mana, and Discord installed.
I never allow any social media apps to be installed... they are malware by their very nature.
I've installed Telegram, Discord, and Twitter on my Tab A 9.7 and I never had the problem.
Google for the button combination.
I already did clear system cache which was successful and I gave it a day to see if it worked out but it didn't. It's still rebooting random every 6 hours especially when I'm not on it.Google for the button combination.
Clear system cache is found on the boot menu.
A hard reset is sometimes called a soft reset and stimulates pulling the battery. On many Androids it's done by holding the power button down for 20-30 seconds until it reboots.
I've never seen a memory leak on an Android and once on an Apple app. More common on Window machines. The ram usage will kept creeping up until it runs out of ram and reboots.
The app causing it will show it in its memory usage in Developer options. Pretty easy to spot.
A poorly coded 3rd party app is usually the cause.
Does it happen in safe mode?
I haven't set it on Safe mode.
Return it if you can. Twist their ears...