I've received a report about another Hiland M644 mystery problem, this time regarding the ESR measurement (firmware 1.40m). In the standard probing cycle the ESR values look reasonable but in the ESR check or C monitor the ESR values are way too high. Have you seen that too with your M644?
Edit: Happens for caps >= 470µF.
BTW, the new firmware will support 8 bit parallel bus and disabled extended command set for ILI9341. Some ILI9341 display modules for Arduino come with the extended command set disabled for whatever reason. And the SH1106 OLED controller will be supported too. Several OLED modules sold as SSD1306 actually have an SH1106. Both controllers are quite similar but not identical. The SH1106 can drive four additional columns, for example.