If you go into Creative Mode while the Creeper is preparing for an explosion, it will explode anyway

If a Creeper comes up to you when you are in the Survival and will start preparing for an explosion, and during this you will switch to the Creative Mode, it will continue to hiss and then explode. How to reproduce:

Command: /summon minecraft:creeper

Command: /gamemode survival or F3+F4 to switch to Survival Mode.

Wait for the Creeper to approach you or approach it yourself.

When it starts to hiss, i.e. preparing to explode - F3+F4 and select the Creative mode

The Creeper will continue to hiss and explode anyway, although it should stop hissing and not explode.