Thank you for the report!
This is actually intended behavior.
The player cannot place a bomb without their body. After detonating a bomb, there is a short cooldown (a few dozen frames) before the body returns.
So during that time, placing another bomb will appear delayed, and it won’t cause a jump either.
If the player could place a bomb immediately after exploding, it would allow for unintended flying, so this system was put in place to prevent that.
That said, if we come up with a better solution, we may consider changing it in the future.
We're currently working on a full paid version for Steam, so stay tuned!