¿Why does Impress Remote Control does not work anymore?

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Hello, I formerly had installed LibreOffice with the default version available on Ubuntu 16.04, with it I used to control Impress presentations through the Impress Remote Control app from my Android Cellphone (Moto G4), with no trouble at all, however I recently upgraded to Ubuntu 18.04 with the LibreOffice version 6.0.6.2 and suddendly the remote control app stopped working. I've followed every instruction: enabling the remote control through the LO tool tab, pairing both devices via bluetooth, trying to make the connection... nothing works. I've even tested the bluetooth connection, I'm able to send files from my PC to the cellphone and viceversa, no problem. BTW my PC is a System 76 Gazelle if that helps.

Thanks a lot in advance.