Tabbing out sometimes causes game to become bugged

[maritz]

Your system information

• System information from steam (Steam -> Help -> System Information) in a gist: https://gist.github.com/maritz/40b6404873ef3c28a28b21a8091a6749
• Have you checked for system updates?: Yes
• Are you using the latest stable video driver available for your system? Yes
• Have you verified the game files?: Yes

Please describe your issue in as much detail as possible:

Sometimes after tabbing out and back in, the game goes into a weird bugged state. Most things still work fine, but certain things don't, like: Dragging the map with middle-mouse (except in very small sections of the screen where it still works), pinging the ground/map/items/skills and sometimes certain sounds stop playing at all. Restarting the game fixes it. Simply disconnecting and rejoining does not - neither does tabbing out and back in again.

Steps for reproducing this issue

1. Tab out of the game while in a match
2. Sometimes now the game is in bugged state

edit: Sorry, thought this was only happening under Vulkan, not true, OpenGL as well, so unrelated to that layer.

[maritz]

I made a video showing it. In the beginning I demonstrate things working as they should. The alt+tab that broke it is at about 1:35.

I don't know if the setting of "Desktop-friendly fullscreen minimizes on focus loss" changes the bug happening. It does however prevent proper alt+tabbing for my wm for some reason. I'll do some testing on this.

https://youtu.be/u85_zFoyDjM

[veglos]

In my case alt+tab stopped working as soon as I open dota.

[maritz]

With "Desktop-friendly fullscreen minimizes on focus loss" deactivated this does not appear to happen at all.

However it means alt+tab only works in a limited amount of ways for me.