Another temporary fix to stop the hashtag spam is to add “freefrom” as a mute word in the muted section on the sidebar. 
nostr:note104j4kx3fcmflrzl4ppenmdyqlg2mtac3qpmyg2pdxz79fqr4q8mqy9thjz
Discussion
Thx god, thx Will
How?
I added the phrase “Freeform is running” so it was a bit more specific
When can we mute certain words instead of hashtags?
To be honest, I do not think it is a solution. What about next they spam on Damus or Primal?