This patch (suggested by https://reddit.com/u/hvis) works for me ...


diff --git a/lisp/progmodes/sh-script.el b/lisp/progmodes/sh-script.el

index a0bbf55..dc296a2 100644
--- a/lisp/progmodes/sh-script.el
+++ b/lisp/progmodes/sh-script.el
@@ -483,6 +483,7 @@ sh-mode-syntax-table
    ?~ "_"
    ?, "_"
    ?= "."
+        ?/ "."
    ?\; "."
    ?| "."
    ?& "."