A read a while ago about a nice trick for input fields.
I know you will probably say that it is clear, obvious and that you always use it…but just in case you did not know it have a look at the below video.
Spoiler: The trick is to provide a space or a series of spaces instead of letters and numbers. Might seem harmless but it can harm
Try it out in your applications - Found the bug in almost all the input fields in the lastest app I checked