Bloons TD 6 Hibernate PC gives Multiplied EXP

[Vox]

Hey guys.
So, recently got BloonsTD6 on steam.
(I have loved the series for a long time, and since they finally released it for PC, I decided to get it).

Anyway, I usually leave my PC in hibernate overnight,
so i can pick up wherever I left of the previous night,
and it saves more power than sleep.

So i was playing BTD6,
and I had a couple of saved games, lost a game on round 86,
and had just started up a challenge.

In the challenge,
I only had Quincy down,
and at around 4 - 5 I just pressed the power button on my pc
(this puts my pc into hibernate) and then went to bed.

Well, this morning when I woke up,
I turned my PC on and found myself on the exact same round as when I went onto hibernate (I could hear Quincy shooting some bloons in the background of the login screen, nothing new, im used to this with hibernate.)
But, whenever i went to start a new game, I realised all of the monkeys I had down in the game that I died to on round 86, before starting the challange, all had ridiciulous amounts of exp, (the ones that actually had a few upgrades already purchased had nearly 1M exp, and others that had no upgrades at all had roughly 200K).

Now I'm not sure exactly what caused this, and I know you don't get that much exp from just completing round 86.

TL;DRStart a game, buy a tower that can pop balloons, hibernate PC, ????, profit.

If anyone else could try this, and see what results they get and let me know, that would be really great. And also, does anyone know why this happens?

Screenshots:
Super Monkey
Ninja Monkey
Alchemist
Druid
Banana Farm

[defaulto]

Sounds and looks interesting...
Tough there are easier methods.

[azertys]

Are there any XP methods that currently work? Can't find any.