Firstly, I made custom action with one parameter is set. (In the parameter field, “$FILE” was used.)  And right click on one file of one commit and choose custom action ,  the custom action I made earlier was  displayed as usual.

Secondly, I made custom action with multiple parameters are set .(In the parameter field, “$SHA  $FILE” was used.)  And right click on one file of one commit and choose custom action , but  the custom action I made earlier was NOT displayed.

(For comparison, I did the same things with Sourcetree For Mac and both showed up. So, this is only For Windows bug.)