I’ve designed a typeface in photoshop based on some scanned in letters which had been cut out/background removed and set up as per Fontself instruction.
However, when I export the OTF and use it within InDesign CC 2019, the some letters will distort when outlined – Illustrator renders similar results but becomes incredibly pixalated.
Applying the correct flattener rule worked a charm, thank you. Outlining is still problematic but like you said this is something that is remedied by updating to CC 2020 so I’ll bare that in mind.