"Recent" contact groups, showing up in Messages as suggested contacts.
I honestly don't know how to phrase this. My mother updated to iOS 11 before I did, and this morning she complained to me about how her contacts were all screwed up. I updated mine last night and didn't seem to have an issue.
She pulled up Messages and went to compose a new one, started typing in my father's first name and about 20 clusters of grouped together numbers came up. At first I had no idea what the deal was, but after a while I figured out they were stored numbers and contact groups of recent group messages she had gotten but deleted.
Is there really no way to turn that off? She can't even find her actual contacts in the mess of stored numbers and contact groups that iOS 11 has saved from messages she has already deleted. Disabling group messaging isn't an option that she can use, it's for work purposes. There needs to be a solution to keep Messages from storing those recent contact groups from messages.
iPhone 6s Plus, iOS 11