I've been using this addon for years and never had this issue.
When I attack targets the usual damage dealt scroll text (the one where you see your damage on the enemy and the crits etc) does not appear.
I can type this script
/console floatingCombatTextCombatDamage 1
which fixes the issue temporarily. Everytime I log on and off (or reload ui). The problem restarts and I have to retype the script to get damage back to show.
I know this is MSBT reverting the change (putting a "0" to the script?) because when I disable MSBT and enter the script, the fix is fine and it's permanent.
Anyone know how to fix this?