How do I fix network and signal issues with dual SIM on iPhone 14 after iOS 18.5 update?

After update of ios 18.5 my iphone 14 device in network issue and signal issue slow internet speed when dual sim on whenever these problem.

when singal sim on when not problem of network speed.

solve the problem

[Re-Titled by Moderator]

Original Title: After update of ios 18.5 my iphone 14 device in network issue and signal issue slow internet speed when dual sim on whenever these problem.