I don't think this is a problem, rather I have two theories :
The things I'm stating here after is purely my guess based upon the facts and situation.
There could be two possible reasons for doing something like this,
First reason, I suspect that Jio will be using these hidden APs to auto configure the pairing process of their soon to be launched range of connected devices (cameras etc.) using My Jio app. Given the history of jio it is more than possible that these devices will only work on JIO's network and thus unlike traditional smart devices will lack an option to manually select Wireless network, as we all have seen in the case of JIO Voice.
Second reason could be to boost their cellular/hotspot network. Since no one would voluntarily want to participate in such a trial which involves sharing their WiFi credentials, Jio sneakily issued a firmware update enabling this "feature", Jio's network already uses TR-069 auto configuration so technically they could simply switch our WiFi on whenever they want, but in order to maintain "security", they issued a firmware update which caused this problem (causing interference as the
router interface lacks an option to select WiFi channel). Since they already have our WiFi credentials, they can share those credentials temporarily using a secure medium to provide their "services".