there isn’t an “official Matrix Client” any more than there’s an “official Web Browser”.
If you’re talking about Element, we just rewrote the mobile apps and fixed verification issues (although support for inbound verification will land next week): https://element.io/blog/deep-dive-into-element-x/
I am indeed referring to Element: PC(Windows) and Android. I'll give the new version a shot next week.
I will note that another class of bugs (or single bug?) that put me off is related to messages and or edits to them sometimes showing up for some people, but not others, and/or on one client, but not another. (e.g., an edit will show on mobile, but the old version will show on PC)
