Consumables not recorded in logs

Hi,
Last night in AQ40 the logs didnt recorded all the consumables. At least one person is missing a flask in the raid. He said he popped it right before Skeram. Is there any specific conditions when the consumables has to be applied in order to show in logs? Does it only record consumables if they pop or fades during combat?

Log in question:

https://classic.warcraftlogs.com/reports/nvP1LXNCM4Bab7Wd#type=auras&boss=-3&difficulty=0

Thanks