I know, that this issue discused many times / go through forum. Seems to me, it the issue still exist or I missed smth.
Issue with Power BI
Can't find the way to adjust it to desired format, as in Windows Regional, E.g.: 123 456 789,00
I can reproduce the issue in the latest Power BI desktop version 2.55.5010.641 64-bit (February 2018) on my side. I already reported it internally, will update here once I get any information.
The issue will be fixed in May or Jun release.
There is a desktop May version released, please update your desktop to this version then test if the issue is gone.