I am have issue in formatting for SSAS measures in live connection. See below screen shot.
As you can see in screen shot. in Show data I am getting correct formatting from SSAS, but in bar chart, I am seeing data in fractions. This is similar in almost all default Power BI visual except Card, Matrix and table visual in which I can see correct vaule.
Is it a bug in Power BI or is there some problem from SSAS side?
By my test this issue should not caused by live connection in Power BI but the SSAS live connection.
Here is a simialr issue as yours, you can take a look at below thread.
For the better format for all visuals, you can vote this idea Better support for SSAS MD formatting.