Thanks Mark.
Upgrading the LM Add-ons plugin has resolved the issue with the league schedule tables.
I have however noticed that my Team Schedules which I am not sure when I last used them are showing the same behaviour:
[mstw_team_schedule team=westend-scr league=scratch-div-2 season=2020]
This is now what is being displayed on the website instead of the fixtures for that team.
Craig