To anyone else wanting to try this update please note the warning on the page:
Important: Access to this pre-release firmware is by invitation
only. Usage without a written invitation from LIFX (for example an email
from our support team) may void your LIFX warranty.
If you don’t want to void your warranty you will want to email the support team at email@example.com, explain your issue and ask if the latest firmware will help. If they think it will they will give you the all clear to update.