Hello, sorry for reviving an old topic but I am also having a similar issue with an ASUS Fan Extension card.  I have been a user of Aida64 a while now but finally decided to make a sensor panel as I have a screen install planned into my PC.  I am running on an ASUS X99-A motherboard and have case fans connected on the board at the CHA_FAN 1, 3, and 4 ports and 1 case fan so far connected to the extension card.  It sees the 3 fans connected directly to the board and is also seeing the H115i Pro cooler fans and pump (the H115i fans are labeled as fans 21 & 22) but it will not see the extension fan.  I am on version 6.32.5600 currently.  I have posted my dump files below.
 
ecdump.txt 
isasensordump.txt 
smbusdump_full.txt