FC 27 HOF: Unleashed League Disconnect Bug

Players chasing the free 86-rated Hero through the Hall of FUT: Unleashed League in EA SPORTS FC 27 are hitting a wave of disconnections. Destructoid reports that the error hits shortly after a match begins, the match result is voided, and the win and goal objectives behind the league become impossible to complete.
The root cause is an EA bug that has not been solved, and the same disconnection issue was already present during the previous special objective in Ultimate Scream, so this is a recurring problem rather than a one-off glitch. The objective ladder runs from a single win all the way up to 14 wins, with a separate goal tally needed for the bonus objective set.
The temporary fix is simple: go to Squad Selection, create a brand-new squad, and make sure no custom tactics are enabled on it. Starting a match with that clean squad should stop the error, but the fix only holds if the opponent does the same, otherwise a disconnect can still happen.
Players who want to keep their competitive squad untouched should keep a separate workaround squad for the objectives and switch back before queuing for Division Rivals or Champions.
Source
Destructoid