Cardiff's appeal against a transfer ban for failing to pay the first instalment of Emiliano Sala's £15m transfer fee to Nantes has been delayed a second time.
The appeal to the Court of Arbitration for Sport (Cas) was originally due to be heard in May.
But Cas confirmed the appeal procedure has been "amended" and a new date for the hearing has not yet been fixed.
They also say the exchange of written submissions between the two clubs is still taking place.
Argentine striker Sala, who was 28, died in a plane crash in January 2019 while travelling from France to join his new club.
French club Nantes and Cardiff have since been in dispute over fee payments.
Cas told BBC Wales Sport: "The parties to the procedure have agreed to lengthen the regular time limits for the filing of the written submissions.
"It is for this reason the exchanges of written submissions is still ongoing and a hearing date has not yet been set.
" Cardiff claimed they were not liable for any of the £15m fee because Sala was not officially their player when he died, and refused to make interim payments as they claimed the deal was not legally binding.
In September, football's world governing body Fifa ruled Cardiff should pay the first instalment of £5.
3m (6m euros) to Nantes.
Fifa's players' status committee also imposed a three-window transfer ban on the Championship club if they failed to pay.
After Fifa found against them, Cardiff immediately appealed over the punishment to Cas, which is based in Lausanne, Switzerland.
In December a Cas statement confirmed "a hearing is likely to be fixed in spring 2020" with a final award "not expected before June 2020".
Cas confirmed an initial delay in May when they said the appeal procedure had been "amended.
" The plane carrying Sala and pilot David Ibbotson, 59, crashed in the English Channel on 21 January 2019, two days after the player's transfer was announced.
The footballer's body was recovered from the wreckage, but Ibbotson, from Crowle, North Lincolnshire, has still not been found.
Sala was exposed to high levels of carbon monoxide prior to the crash, a report later revealed.