The just released DotA 2 7.39 gameplay update broke my Alt Modifier hotkey which I bound to SPACE. It kept its function, but opened the shop panel with every press, too. I like using it to see ranges etc., but the shop panel opening and taking a third of your view defeats the purpose.

The problem remained after resetting the hotkeys to defaults. Vaguely remembering a similar issue years ago. I found the probable issue by trying the console command key_listboundkeys, which showed the line:

[Console] [Player 0] : "SPACE" = "toggleshoppanel"

It seems to keep that bind even if the shop is bound to another key. Above binding changes if you assign the SPACE key to another function in the menu. But when trying to bind it as the Alt Modifier it goes back to the shop panel. Unbinding it in the console fixes it, i.e., the command:

unbind SPACE

Removes the binding and the Alt Modifier can be set to SPACE in the options menu.

So yay, figured it all out by myself. Felt so proud about it that I reported it as an Issue on the Dota2-Gameplay Github tracker I found during my searches. Only to then find out others had similar issues. :) Some even came up with the same fix. It seems to have helped at least one other guy, though. I'll take that.