This same issue has been happening to me across a variety of matches (both bot matches and against actual players). My game does not freeze but randomly it will crash my Discord program. This may happen anywhere from 0-5 or more times in a single match. I am lead to believe that the crash occurs because of something GPU or Graphics Driver related. The issue only occurs for me while in a match, never on the main menu. One distinctive characteristic about the issue for me is that while I am playing the game and the game is focused, Discord on my other monitor is awfully sluggish. If I unfocus the game, Discord seems to "catch back up".
EDIT: I've swapped the Rendering Engine of my game from DirectX 11 to Vulkan and I have fixed the issue. Maybe an issue with DX11?