I'm aware this has happened for many in the past.
Twitter contacts are missing from the people hub.
I've lost the connections between contacts in the people hub from other services and their Twitter accounts. I've checked and double checked that I'm not filtering them out and when I edit connections with contacts there are no Twitter contacts available to connect to.
Have tried deleting the account and revoking access in Twitter, power cycling the phone and trying to setup again but still no Twitter contacts available.
Anyone else experiencing this? Or are there any known API issues stopping this working?