I too am facing a similar issue.
I built an report in Powr BI Desktop and when I publish it to my Power BI Workspace or view it in my Power BI App, most of my visuals become misaligned. I'm not sure if it's all (Matrix, Cards, Shapes) of them or just the Matrix
Desktop View:
Power Bi APP View:
I have tried to embed the same Power BI Report onto SharePoint and it slightly matches my Desktop Layout which made me think that it's a ratio issue in the Power Bi Service Workspace?
SharePoint Embed View:
The report uses a standard 16:9 layout (1280x720), I've tested it on Edge and Chrome but get the same result. This error occurs for myself and for other users.
I do recall that the report worked fine in October/November but definitely hasn't worked since February so it may be related to a recent update. I've tried clearing the cache, trying it on a different computer. I've seen that there was a similar issue a couple of years ago.
Is there anything I can do or is this a bug that will be fixed in the next update?