Cartrige missing error a missplace problem gone meanwhile?

in my case the missing cartridge error is based on a misplaced sensor…
So by level up the cartridge with tape (2mm) solves the Problem.
The Question is, why Fomlab don´t mention this point in e.g. FAQ?
Version a: all cartgidges has to be replaced (expensive)
Version b. The Sensor on the Formlabs is moving by time

Is there any experience? also is the problem still present with 2019er cartridges