panic: ptrace status unexpected: got 9, wanted stopped

goroutine 1504767 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).wait(0xc000c8f2c0, 0x0, 0xc348)
	pkg/sentry/platform/ptrace/subprocess.go:323 +0x3fb
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).syscall(0xc000c8f2c0, 0xc000feacb0, 0xc000feae48, 0x2, 0x2)
	pkg/sentry/platform/ptrace/subprocess.go:390 +0xc3
DIAGNOSIS: