Hi Ham,
What's your criteria to filter out contacts with valid email in CRM?
I filtered them with "Email field contains @".
At beginning, I filtered all eligible contacts in All Contacts view.
Then I still filtered these contacts with same criteria in dynamic marketing list.
Similarly, 155 contacts were filtered out and being selected as previous step.
Finally all eligible contacts were added into the marketing list after saving window close.
My environment:
Version: 9.1.0000.6228
Browser: Chrome 75 (64-bit)
Please clear cache and try to close other programmes and work with only one tab open for test again. (I only ran Chrome and opened one tab for CRM website)
In addition, does this issue still occur whenever you try to add contacts?
Regards,
Clofly