This has been there since the day 1 of 5G launch.I have noticed a big problem on Jio mobile network from at least 1 month if you activate 5g on jio sim then you are unable to get ip4 network on 4g network if you select only ip4 through access point setting then mobile network disappears, and if again you select only ip6 network then network comes back. because of this problem some websites and apps are not working properly, but if your sim is not 5g activated then ip4 and ip6 network works properly on 4g network.