Titan disconnecting from wifi.

I'm hoping maybe someone here can help me out with a problem I'm having. I'm using the OG Titan phone, and yesterday while trying to find a solution for an issue I was having, I reset my wifi, mobile data and bluetooth settings. Ever since doing that, my phone is unable to stay connected to my wifi? I set everything back up the way it was, and it can connect to my router, but after a few minutes it'll disconnect for no apparent reason that I can figure out. It's like the phone just loses sight of every network in the area for a few minutes until it eventually finds them again and reconnects. It never did this before though so I'm struggling to figure out what the cause is because it's extremely frustrating for it to disconnect seemingly every few minutes.