https://www.cbc.ca/news/politics/conservative-matt-jeneroux-resigns-9.6970100
As the article points out, this is the same Matt Jeneroux that said he was going to resign last fall. Is he takeback-ing it before committing to an official end date, cancelling the by-election? From the November article:
Jeneroux later clarified that his "exact date of departure will be determined at a later day," but suggested it would be "this spring."