Palace are part part-owned by John Textor, who tried unsuccessfully to purchase Everton last year, when Farhad Moshiri was desperately seeking a new buyer after the collapse of the ill-fated 777 Partners deal.
However, Textor was prevented from doing so because he had a significant stake in Palace. He would have been required to divest himself of that shareholding if he were to buy another Premier League club.
In the end, of course, another American billionaire, Dan Friedkin, stepped in and secured the purchase, finally closing a long and drawn-out process which had become almost farcical at times.
All that is history. But while Textor's failed bid highlighted the domestic conflict of interest, like the Palace part-owner, The Friedkin Group also has other European football clubs in their portfolio, in particular Serie A giants Roma.
Last month, Palace won the FA Cup final, beating Manchester City to get their hands on a first ever major trophy and qualifying for European competition.
Now, however, it appears very likely that the Eagles will be denied a chance to compete in the Europa League because Textor's other main overseas club, Lyon, have also qualified for that tournament, and so the two could be drawn against each other, something that would be contrary to UEFA rules.
It seems as though the American failed to sell his stake in Palace early enough to avoid the deadline for UEFA to decide the English club's fate, which is at the end of this month.
And even though a sale may happen soon, as Everton supporters know only too well, the Premier League can take a long time to OK any takeover deal.
At a minimum, it would be around three months at least and so it does look as though Palace fans will be prevented from seeing their team playing in Europe in the 2025-26 campaign.
All this has a potential impact on the Toffees as well as the club looks to make sustained upward progress under their new owners and manager, David Moyes.
Although securing European football might seem a longer-term ambition, at the start of the last campaign, very few would have put their money on the Eagles to win the FA Cup or that Nottingham Forest would make a sustained run at a Champions League place. Especially after they had been deducted points as the Blues were for PSR breaches, and nearly got relegated the previous season.
So things can change very quickly in football, both on and off the pitch, and if Everton were to have a good summer transfer window, signing the key players they need, particularly up front, they might be able to do something similar.
That does seem a big if at the moment, as the Blues are struggling to get new deals over the line for the players they want, and the legacy of the PSR saga is still hanging over the club, until the end of June at least.
Were things to go well, though (a very un-Everton-like scenario), then it would just be this club's bad luck for Roma to end up qualifying for the same competition! That would mean this situation could be potentially be facing the Toffees too.