Frequent sudden restart

[AS236]

Hello, my phone is galaxy j6, recently (for nearly a month) it has been restarting itself frequently. The problem was progressively increasing and the number of these "sudden restarts" has increased with time, sometimes it shuts down and i can't turn it on, a red message appear at the top left corner "Could not do normal boot, invalid kernel length" and i continue trying to turn it on sometimes by pressing the volume up and down and the power key at the same time, and after some time of experiencing it works and the phone runs. After about a month of suffering with this frequent shut-down problem, i flashed my device using odin ,one file flash, (i downloaded the identical firmware of mine from sammobile). After flashing the device the performance was improved, but the problem was not solved, it became much less frequent however. Now the phone restarts itself when i try to update or download apps from Play Store. Please tell me what's the cause of this problem and how i can fix it.

[KennewickMan]

Try rebooting into recovery mode and clearing the cache partition.

[AS236]

I did. And i made factory reset/clearing data

[mistt]

Ssss

[KennewickMan]

Are you still experiencing the same issue(s) after a factory reset?

[AS236]

Yes and even after flashing the phone using odin (one file flash).
But it is less frequent now.

[KennewickMan · Accepted solution]

You may have a hardware issue. Might need to send it in for servicing.

[AS236]

Thank you for trying to help

[KennewickMan]

Of course! Anytime!