Shelly HT Connection Issues and Troubleshooting

Hey everyone, I’ve been trying to set up my Shelly HT devices with LED displays, and I must say, it’s been quite a journey. I purchased 25 units, but unfortunately, about half of them are having trouble connecting via the Shelly app. Whenever I try to bind them to my Wi-Fi using the app, I keep getting a Bluetooth connection error. It’s really frustrating because it happens right after the device is detected. I’ve tried everything from resetting the device to a factory default, rebooting, and even checking the Bluetooth settings on my phone, but nothing seems to work. Strangely, some devices connect without any issues, so I know it’s not a compatibility problem with my router or Wi-Fi. I’m really stuck here and would appreciate any advice or tips from someone who might have encountered a similar issue. Thanks in advance for your help!