If you’re one of the many people who are excited to try Destiny 2’s beta, you should know that — as a slice of a game that’s still in development — it may not run as smoothly as you’d expect the final game to run.

The beta arrives next week, less than two months before Destiny 2 launches on consoles on Sept. 6. (A beta for the Windows PC version is coming in “late August,” so there will be a similar gap between it and the PC version’s Oct. 24 debut.) Major publishers have made something of a mockery of the word “beta”...