I don't seem to be able to carry on from the end of Hot Bot, I have to start The Bell from the chapter menu. Is this intentional or am I missing something?
If by The Bell you are referring to the new Maxine Quest "The Dive" in v1.45.2 then it is likely you simply don't meet the requirements to initiate that Quest. Was your playthrough of "Hot My Bot" reached via Chapter Select or through a long play? If it is a long play did you choose to follow Maxine during "Nothing Wrong with Me" or did you go with Lindsey? If you could provide a little more information we might be able to help answer your question better.