Another thing to consider when using sketchy styles is that edges that make up curves can often be shorter than the shortest edge stroke. When that happens, the curves tend to disappear as in this example.
Screenshot - 11_13_2019 , 9_53_58 PM.png
Welding those edges together gets around that problem as shown here:
Screenshot - 11_13_2019 , 9_55_01 PM.png
The easiest way I've found to do the welding is with Eneroth Auto Weld which welds any edges that can be welded in the selection. TIG's TIG-Weld is also good.