Suggested fix (unconfirmed): Verify your game files through Steam and update your mouse drivers. If the issue persists, switch the game from fullscreen to windowed borderless mode.
The problem
Does anyone facing same issue? The left click is lagging and blinking instead of moving smoothly sometimes after clicking the left click
No confirmed fix yet. Players suggest: verify game files or add "-vulkan" or "-dx11" in game launch settings, right click dota 2 in library and then properties
Day One Fixes