I can reproduce this behaviour on my 10 III (4.5.0.16) and I believe your topic is related to this previous thread.@direc85 provides an answer there: this is expected behaviour.
I tried the suggestion to disable the control on either one of them and I chose to disable the control on the Sailfish side (“Charging mode: Normal”). I wasn’t able to successfully apply the lower threshold despite the effort, but maybe someone else has an idea, how to solve this.