Why don’t my speakers remodel when Bluetooth is turned on?

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I have an iPhone SE and iPad 2, both OS as up to come from as possible. I punctually use them with a Logitech Bluetooth Announcer connection that I’ve had for several senescence. I have no disquiet data and pairing with the connection, and streaming whole caboodle precisely. However, if I incapacitate Bluetooth and then turnabout it on again, either from Settings or Curb Pith, I always need to revitalize to the speakers manually in Settings. I have discover that for some devices, turning on Bluetooth will revitalize to whatever phonic whatchamacallit was last in use, so why not this device?