i've found the solution by clearing all filter, then arrange the format layout manually in each columns while "Kepp Series Settings On Filtering In Edit Mode" is Off. Thus, column witdth are fixed when i select any slicer.
I can't share my report but here is a few screen captures of the main problem. I changed the formatting of current value column when last 12 months filter was applied. When changing the date filter the formatting resets.
I have tried all the suggested solutions in this thread but none of them work. I would think that the formatting of a visual doesnt depend on the data behind or filtering used. It is quite weird behavior.
I have tried basically every option that are recommended in this thread, but I'm not able to keep the custom formatting consistent when using a slicer.
It seems that the only option is to do the formatting separately for every slicer value that you think that the user would like to use. At least in my case this makes the visual unusable. It's a shame because the visual is otherwise very good.