Also just explored new "bug".Martin Vindis updated ACC Dedicated Server GUI with a new update entry:
ACC Dedicated Server GUI V1.4.6.2
Read the rest of this update entry...
When set rain level lower than 0.05 (5%).
For example 0.04 (4%). It saves this correct to config, but when we open GUI it bring down rain level for -0.01 each time. So when we set to 0.04, next time we open GUI rain level would be 0.03 etc.