We recently upgraded the game client to be 64-bit in the 13.7 patch. This change was tested for compatibility as well as soaked on PBE, but since it was a significant change, it can still cause some unexpected problems. We are currently investigating new issues that have arisen since the upgrade.
We have noticed that some third-party apps like Discord, Blitz, and others may not be working properly causing instability. If you're experiencing issues, we suggest checking these apps and making sure that your drivers are up to date.