`channel.permissionsFor()` does not take timed out guild member permissions into consideration

According to docs, timed out members should have lost all permissions except VIEW_CHANNEL and READ_MESSAGE_HISTORY, if they do not have ADMINISTRATOR permission. However, channel.permissionsFor() and guildMember.permissions do not reflect the permission changes on timeouts. I understand that we can check if a guild member is timed out with guildMember.isCommunicationDisabled() and many other ways, but having a all-in-one method to check the current permissions accurately is more convenient for us.