Best of all is the three boxes+javascript option when it responds too slowly and drops some of the digits you typed. And then the "automation" interferes with your attempts to correct the number. Aargh!
I'm shocked at the performance of some large websites on mobile. Apparently whatever JavaScript they use makes it impossible to type in the search box for at least 10 seconds after the page finishes loading.
I often have exactly this problem with IDEs trying to be clever. I'm typing the bits of the code in my own way, the IDE's trying to fill out bits in its own way, and the whole thing's a mess.
