Re: Power BI August 2026 Feature Summary

Hi MS team,

Thanks for some of these updates (especially the donut chart centre value which has been requested for so long), however the current update has created a really messy situation for us given how much we rely on our custom JSON theme to ensure brand compliance, and the fact we now have to release a new theme file to prevent styles for new reports breaking by default (unless every user remembers to revert the base theme to 'classic' 2026, which they won't).

Specifically, the default slicer behaviour still reverts to the list rather than the dropdown. However, if it's still planned that it will eventually revert to a dropdown style as a default, that would mean swapping around our current defaults would end up being redundant anyway, and as you're aware, changing style presets after the fact (i.e. renaming/removing them after application) leads to formatting errors and in extreme cases a break of function. This is significant when it can potentially effect hundreds of embedded PBI reports available to external customers.

I've included the previous posts about this with responses ​from DataZoe​ below for context, please advise if there's a timeline for when this will be 'fixed/attempted again', thanks.

My original query above (from July update thread)Data Zoe's responseMy follow-up with further question

Also, if you can respond to my query from last month about the image visual functionality (copied below, also from the July comments thread) that would also be helpful, but the priority is definitely the default slicer behaviour/formatting mentioned above.

Finally an update for alyssaphil​, this month the PBI release updated in the app store version within 24 hours as expected, so it seems last months delay (thankfully) was an anomaly.