There is a less common issue fixed in 17.3 where the auth services could break on refresh...
It is actually a long standing issue going back to at least the 11.4.x days, but is quite uncommon....most customers never saw the issue.
In short. on refresh there was some unnecessary stuff being done and any time there are changes....something can always go wrong regardless of how remote...
In 17.3, those events on refresh were limited to when there were actual changes....which should be very rare....

So it is possible you just got unlucky by getting bit randomly in short order by a very rare issue and that will likely never happen again....or there could be something else going on...
Try redoing what you did last time and just monitor for now....


The MS Patch above caused frequent wide-spread issues the last few months...........which is why I pointed that out 1st...