@Feurret Thank you! I'll wait for your feedback. Best regards.

@LeZs Hi, the support ticket ID is #TKID250906060. If there isn't any related email, could you please send an email to support.forum@tp-link.com and add the ID in the subject? Wait for your reply....

@Simorame Thank you very much for your feedback. Have you seen the main Deco turn red during the disconnection? Apart from the main Deco, do you have any other devices connected to the ISP router?...

@flynia Hi, thanks for your time and patience. The 1.2.0 version for Deco BE85 doesn't support "WiFi Access Control". This feature is still planned to be added to Deco BE85. Best regards.

@Giorno_Giovanna Hi, welcome to the community. May I know your SIM carrier? A new firmware 1.3.0 was released a few days ago. It is recommended to update to the latest firmware version to see whether...

@Flo2010 Hi, welcome to the community. Did it help to enable QOS and manually set the bandwidth to be 2Gbps download and upload when the 2.5G port is connected to the ISP modem? Wait for your reply....