More chance of the pump spitting something, or chewing something through and the solenoid is what is required to close, so filter after the pump, before the valves/front case (JetCat Rx turbines have valves under the cover) Always used JetCat F-30 type. Assemble filter and re tighten cap next day to take up O ring compression...never needs looking at again, never cleaned out a filter in 10 years.
Do not use Festo clear filters, seen too many leak.
Dave