What the heck happened to this?

Well? Where are the bug fixes? Where are the mentions of the bugs you’re “fixing?” Jesus, there are dozens of post illustrating Sombra’s bugs, take a look at some of them! A list of Sombra's Many, Many Bugs (6), Now with more LOS Bugs! - #83 by Vinciri-1320

Don’t they show bug fixes in the patch notes?

They do, and there aren’t.

Are you sure you’re checking the patch notes for patch 1.25? Because there are some bug fixes listed on there.

There are.

Sombra

Fixed a bug that prevented Sombra’s Hack from interrupting Symmetra’s Teleporter placement
Fixed a bug caused Sombra’s Hack to be interrupted by thin environment objects (e.g. lamp posts)
Fixed a bug that prevented Sombra’s Translocator from being destroyed when it was thrown off a level

And none of those have fixed any of the aforementioned bugs that have plauged Sombra for months (and in some cases, years). Hell, two of those were a direct result of the PTR

Either way, your question is answered. Patch 1.25 did have Sombra fixes. One of them is indeed a bug that was complained about a lot too, hack canceled through thin objects.

Which it still does.