Secure Score wildly fluctuates from 100% to 0% to 100% scored/regressed

"Create Safe Links policies for email messages" & "Turn on Safe Attachments in block mode" improvement actions regress to 0% approximately every 48 hours. 

Wondering if anyone else has come across this and if there is a solution?  It's only these two improvement actions and no changes have been made after adding additional domains in early January.

Thank you