iOS 12

iOS 12 was released on September 17, 2018.

The only problem that we've seen with iOS 12 is that sometimes the card reader is not found.

When using all of the following:
… iOS 12
… R2S or Sub Rosa
… iPad (not iPhone or iPod)

If a PKard Reader is connected when the iPad goes to sleep, there is a chance that the reader will not show when the iPad wakes up.

This problem can be worked around in several ways:
… by putting the R2S or Sub Rosa app to the background (pressing the home button) and then bringing it back to the front.
… by disconnecting the reader and reconnecting it.
… by pausing for a few seconds between waking the iPad and unlocking it; this will likely avoid the problem altogether.