That is an interesting point.
If the leaked log from the pre-crash LionAir flight is accurate, the captain noted "STS running reverse". It was a prosaic description, appearing to lack the detail and urgency that one would associate with a catastrophic nosedive only arrested due to the fortuitous circumstance of an off-duty 737 pilot sitting in the jump seat knowing the correct procedure.
But the dive was clearly
not arrested by the runaway stab trim procedure - the traces clearly show it is recovered and mcas continues to operate until cut-out some time later.
Prelim report says that an entry was made on an electronic reporting system, including: "Airspeed unreliable and ALT disagree shown after takeoff, STS also running to the wrong direction, suspected because of speed difference". This is different to the maint log report, which didn't mention STS at all - it's clear they didn't think STS was the real problem, merely another symptom of what they reported in the log.
STS also trims intermittently, is stopped by pilot trimming, and if speeds are unreliable it's probably very reasonable to assume that STS is affected if the a/c is trimming itself weirdly. Particularly in the absence of any knowledge of MCAS and with no AOA disagree displayed.