Does SwitchBot connect to multiple Hubs?
No. SwitchBot automatically select a nearst SwitchBot Hub (Plus) in the 1st time paring (by enabling any of Alexa, Google Assistant or IFTTT). It always use the paired Hub (Plus) then.
If you have multiple Hubs, and your SwitchBot is always not reachable via the Internet (e.g. when Bluetooth temporarily disabled, or voice control), try unpair your SwitchBot from the App Device List, and pair once again.