Negative y axis appears when displaying small values, less than 1 using scientific notation

We deal with results that are small values less than 1.  They are not negative numbers.  But they are often in the range of 1x10^-2 to 1x10^-12 values.  We have been using PowerBI for the last year.  Recently in the last month it was noticed that our charts of these numbers create a false negative axis.  This makes the charts unreadable.  see figure "example of initial problem".  

We have tried setting the min value to 0 but that does not solve it.  We have found that increasing the significant figures of the value to 4 or 5 helps temporarily.  see figure "example of fix when increase decimals displayed...". 

However this only works initially.  If the user then selects a filter that reduces the dataset, then the problem returns - see figure "example of problem return..."

We have a large range of values (all less than 1) to display so we cannot increase the decimals of the scientific notation further - 4 or 5 digits are already too many to display anyway given the uncertainty of the values to begin with.  

We are not sure when this problem started; we did not notice it in the spring or early summer.  So it must be a new issue that started sometime in the summer.  Sorry we cannot comment on which version.