Question about Denon Envaya Mini DSB-150BT

I have problems with the Bluetooth connection. According to the instructions, you only have to press the Bluetooth button and then the light flashes and the connection should be established. However, in my case, no light starts flashing.... I have now found out that I can press the Bluetooth button immediately after starting the speaker. Then the pairing also works. But it's a bit of a hassle to restart the speaker every time you need to pair it again. I also wonder if this is how it works when I want to pair two of these speakers. Is this really the case or is my model simply faulty? Thank you for any advice.