iPadOS & IOS 13.4 – Wait
IOS 13.4 for iPhone was released on March 24, 2020. We are currently recommending that you wait on this upgrade.
As with many updates, new issues or bugs will occasional come up. If we see concerns raised by the marketplace, we will rcommended that you wait to complete this upgrade. We
A good example of these concerns were presented by the GottaBeMobile website:
Some iPhone users are noticing bugs and a variety of performance issues after installing the new firmware. Some of these issues have carried over from older versions of iOS, others are brand new.