Mobile Data and Network Connectivity Issues

After the current latest update(October 1st 2019), I have been seeing that there is some misbehavior or changes in the network software. I mean, when selecting the manual network, It takes at least 2 mins. If I keep automatic, sometimes the network goes off and shows no network. But when I search manually there is the network available and gets connected too.plus there is a huge speed loss in mobile data as well. please help me if anyone knows a solution or if you too have this issue please let me know so we could make a huge complaint regarding this so that we could expect a fix in the November update.