I encountered the same bug with quicksilver reload, It wouldn't activate even though it wasn't on cooldown, I think it started mid or late into the match or maybe I didn't notice it until then.
I encountered the same issue, restarting did not fix it but right clicking (or left clicking I couldn't reproduce) around the build browser button finally brought that menu up again, I deleted the build that caused the issue and after using the shop again the game crashed.
Build editor and shop...
Changes to ultimate ability quickcast option on other heroes are not applied when using Sinclair Audience Participation.
Example: Change Kelvin frozen shelter quickcast option to instant cast, copy ability with Sinclair and cast, it behaves the same as Sinclair quickcast option for Audience...