Personal Hotspot automatically disables itself on iPhone

And I keep having to unlock the phone, pull the data options, re-enable. Can happen once or twice per session. Everything works fine, sometimes connected stuff lose their connection, but auto reconnect, no big deal, life goes on. But when it gets auto disabled, that's annoying, need to manually unlock phone and re-enable. Sometimes phone is charging some distance away, not an arm's stretch, so I have to interrupt my work, get up, go to phone, unlock, re-enable, get back, sit down, continue. Sometimes cellular data may get unstable, sometimes electromagnetic interference can happen, okay, but why does it necessarily have to deactivate when it happens? Doesn't happen with wifi. Doesn't happen with cellular/carrier to the phone itself. Doesn't happen with bluetooth. Would love an option to make it deactivate if and only if I manually do so, much like these other connection protocols I mentioned.

[Re-Titled by Moderator]

Original Title: Personal hotspot keeps automatically disabling itself