@arstechnica This doesn't look good but if it was actually dangerous they'd be scrambling to ready a rescue craft or coming up with an emergency deorbit plan using the CM thrusters for attitude control like Skylab 3.
@arstechnica I suspect that the He leaks are not what is really worrying NASA but rather the fact that five thrusters stopped working on approach to ISS.
It would be a little difficult if half the thrusters stopped working as they got ready for reentry.