Sometimes someone one is following blocks and then unblocks one, which has the effect of forcing one to unfollow them. (I did not do this to you, but it is a thing people do for valid reasons.) Sometimes someone one is following blocks one, full stop, and then anytime their reblog commentary crosses one’s dash, one’s dash suggests one follow them, even though one is not allowed to follow them again because they have blocked one. Sometimes one’s dash suggests one follow someone that one is already following! And the feature is just unnecessary visual clutter. I wish they’d get rid of it.