Honestly Walsh must have directly contributed to conceding at least 5 goals so far this season. Move him up the pitch, play him in a two or put him on the bench, he can’t play that role.
playing a ball that rebounds to him off a post or crossbar, having previously been in an offside position
https://www.fifa.com/mm/document/afdeveloping/refereeing/law_11_offside_en_47383.pdf