Android smartphones gets disconnected after a minutes usage. Even if sit next to the Extender. So this is not related to weak range. Extender connects to router 2.4ghz and extends both on 2.4ghz and 5. I tried 3 smartphones all with Android 12 or above and latest Qualcomm SoCs. All has this disconnect bug. 

While my laptop with windows 11 doesn't have this issue even if very far from the Extender. I have updated to latest firmware (which is typed in during this thread making) still has the bug. The latest firmware had a changelog mentioning that "Fixed bug of some IoT devices disconnecting from Extender on 2.4ghz". Looks like it didn't get fixed really. Please look into this.