panic: ptrace status unexpected: got 9, wanted stopped

goroutine 584 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).wait(0xc4203623b0, 0x1f)
	pkg/sentry/platform/ptrace/subprocess.go:304 +0x31c
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).switchToApp(0xc420394a20, 0xc4204852c0, 0x10d2280, 0xc420153560, 0x0)
	pkg/sentry/platform/ptrace/subprocess.go:462 +0x5ed
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*context).Switch(0xc4204852c0, 0x10cad20, 0xc420394a20, 0x10d2280, 0xc420153560, 0x7f7effffffff, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/platform/ptrace/ptrace.go:102 +0x90
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc42072e900, 0x10bc5a0, 0x0)
	pkg/sentry/kernel/task_run.go:209 +0x244
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc42072e900, 0x61)
	pkg/sentry/kernel/task_run.go:95 +0x265
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:258 +0x194