It takes a few runloop execution until the watch becomes responsive to button presses after boot.
When the 20hz timer is disabled (see https://github.com/BenjaminSoelberg/openchronos-ng-elf/issues/47) this is more noticeable. A fix could be to enable the 20 hz timer for in sec upon boot. Other strategies might exists as well.
It takes a few runloop execution until the watch becomes responsive to button presses after boot. When the 20hz timer is disabled (see https://github.com/BenjaminSoelberg/openchronos-ng-elf/issues/47) this is more noticeable. A fix could be to enable the 20 hz timer for in sec upon boot. Other strategies might exists as well.