The brunette was among cast members past and present taking part in the show, including Jack P Shepherd (David Platt), Katherine Kelly (Becky Granger), Tupele Dorgu (Kelly Crabtree) and Wendi Peters (Cilla Battersby-Brown).
"Kym got very emotional during some of the filming," a source told the Daily Star Sunday.
"She said she saw a ghost and that really shook her up. It was quite intense."
They added: "She ended up breaking down on more than one occasion.
"The filming of the Vera death scenes was in everyone's memory and I don't think she could get it out of her head."
According to the insider, Ryder became convinced she'd seen something go bump in the night during her visit to a spooky location on the Isle of Man.
It's not the first time the cast of Corrie have gone looking for ghosts.
Simon Gregson, who plays Ryder's on-screen lover Steve, was a guest on a special edition of Most Haunted, also hosted by Yvette Fielding.
Ironically, Fielding once auditioned for a role on the soap, vying to play Rita Sullivan's (Barbara Knox) daughter.
