Game crashed 10+ times today

I usually crash maybe once a night. Today I played throughout the day and have crashed at least 10 times or more. There is no real in-game function that is the cause, its at random times. I get the message that my ISP might be rebooting but that doesn’t seem realistic. I have been playing the missions from the beginning that I overlooked when I started playing, maybe that area is buggy to long-time players? The every once in a while crash doesn’t bother me, even in battle, I log back in very close to where I left. But crashing so often is beginning to be annoying. Is there any fix for constant crashing?