Tested with local prod keyserver build with physical iOS device.
Connected my farcaster account and confirmed auxUserStore was populated with farcaster mutuals:
{F1554363}
Went on to Warpcast and unfollowed both Ginsu and Varun and upon reconnecting Farcaster account, confirmed they were both null values
{F1554364}
On following Ginsu or Varun individually, only one of them is added to auxUserStore.