Why are you blooming?

Hey Gardeners,

about three weeks ago I started some cucumbers (Boston Pickling). But today I found this buddy blooming. Now I have some questions in mind:

Is the plant still growing, even when it’s already in bloom?

Does it make sense to chop off the bloom, so that the plant is keeping it’s energy?

Why is this happening? Do I have lightning issues or something like that?

Many thanks for all useful information! ☺️