Hi,
i have an update so to speak, but not much of a solution. After not receiving anything from support, I wrote to "autelpilot" from where I bought the drone. They was so kind to answer, but as expected did not deliver a solution. In fact it was a bit fun communication. At first i explained what the problem is and in response they told me that not fully undarstand what i'm tolking about. They asked me for some clarification and, if i can to send some screanshot. In response i gave my best to explane how the BMS should work and what exactly not working. Now the funny part, they responded to me that, this is perfectly normal and that the self-discharge function is trigered at high temperature environment and as whole the trigering of the self-discharge is a so-so situation and not to worry too much about. In responce i send them a screenshot from the manual, which obviusly they did't read very carefully, where is exactly written how it works. In short, I explained i do not have a warranty claim or so, but to rise attention on that issue. I'm aware that is pointless, but any way. In the final response i received assurance, quotes "We have forwarded your suggestions to my engineers and hope to effectively address this issue in future firmware updates"
So time will tell. I hope to see it working after next update.