With the 1.22 update, I needed to modify my production line to change the order for wheel and tyre assembly.
I paused time, deleted the three offending slots, then placed the Brake slot which triggered a Tutorial dialogue.
Dismissing the Tutorial dialogue then started time elapsing at 1x.
I paused time again, then placed the Wheel slot, which again triggered a Tutorial dialogue.
Dismissing the Tutorial dialogue again started time at 1x.
ps. sorry I submitted this without reading the Bug Report Guideline first.