Focusing On An Input Box Quickly Will Delete The First Two Characters Typed! If I focus on a user-input box, select what's in it, press delete, and start typing, the first two characters I type will get selected and deleted.
Let's say this is an input box:

Input Content

I put my cursor there:

Input Content |

I select:

|Input Content

I delete:

|

I type:

a|
b|
c |
cd |
cde |

When I type in an input box that I have selected in, the first two characters are selected and deleted.
I figured out the answer by myself.

Input boxes in web forms tend to lag a little, and so does my selection. If I select all the text in the input box, dragging my cursor from the end to the beginning, the selected area will lag behind half a second.

That lag is what causes the problem. When I start typing afterwards, the selection is still active, causing it to replace one or two characters if I type too fast.