In these instances, you can either toggle your sprint or hold down the run button (if you’ve made running the default) to make your character walk.
To be fair, there will be moments when you won’t want to run. You might be having a hard time platforming between made structures. Or, you’re trying to be sneaky while searching through a house; rival players can more readily hear you when you’re running. In these instances, you can either toggle your sprint or hold down the run button (if you’ve made running the default) to make your character walk.