Hi and sorry for the slow reply.
I DO understand your emotions regarding "their assumptions" and hopefully unfounded allegations but unfortunately the self protectionism of the Government / Justice system look at it from a view that is as convoluted as a wiring diagram of a calculation processor in a super computer.
I spoke before about your statement "it was online and not contact" and that in reality, there is no difference because it is a fact that both do create a victim. I fully understand your belief in yourself, but you could say that "if you are willing to look at an image, than if a physical individual was present then there is the percentage chance you could be persuaded to touch by the same psychological emotions that made you view. Note I am not judging you BUT that is how they look at it.
Accepting (though not agreeing) with their assumptions will allow you to focus on future efforts to demonstrate that you would not, and not on a historical assumption as you cannot change those written words. Efforts could be via voluntary psychological interviews and reports, and working with child protection charities; even the NSPCC will help. You have to let go of your guilt from these assumptions and use the energy in a positive manner and so future written words are changed.
As mentioned, my offence was that I paid for sex with a working lady that unknown to me (and her other clients) was under 18. The condemnation and continual knock back, and so punishment I now receive, is because the PPU etc believe "I may" seek underage children. This is even though even I was always found unsuitable to attend ANY sex offender courses. Independent and justice system psychological assessments all stated I have no interest in underage individuals, Probation stated that if I had know the true age of the lady I would of not committed the offence. Therefore my self rehabilitation strategy has been to accept their "self protectionism driven assumptions" and their demand "to prove I would not" - though give no support in how I am able to do that - and do what I advised above to you.
In regard to Malaysia, they do not accept individuals such as us and so if discovered will be forced to leave. Sorry. Also your passport would have the immigration stamp and so if your PPU inspect it on your return you have to think about what they would say, especially as you didn't declare that on your notification of overseas travel. The risk is that you may create an environment of them denying future trips to other places because of the this on the basis of " how can they trust your words".
Good luck in whatever you do and I hope you accept my words as I mean, SUPPORTIVE not judgmental.
Learn from yesterday, live for today, hope is for tomorrow else what is left if you remove a mans hope.