Hi,
Been testing Hyperion.ng and it seems to crash whenever I set it up with more than 400 leds (using APA102 600 leds), when opening the interface with that amount will just keep on reporting "Lost connection to Hyperion service!" in a loop.
Nothing in verbose logs and it does work fine except for the web interface part, easiest to duplicate is with the attached config and used it with latest git version (commit: 622a1718085589da58f58e9f1a7617d940e94ee3).