Here is more on the online brouhaha.
Who is Sebastian Stan and why are fans canceling him on Twitter?
The actor and his new girlfriend have been angering fans by apparently blocking them on Twitter.
As a result, #sebastianstanisoverparty is trending.
Stan has starred in such films as Captain America: Civil War and Avengers: Endgame.
The 37-year-old action star is due to reprise the dual role of Bucky Barnes and the Winter Soldier in the TV series The Falcon and the Winter Soldier.
He has been reportedly dating actress Alejandra Onieva.
Ironically he said earlier this year that he has gotten into photography to cope with the coronavirus crisis while living in New York City.
“There was something about seeing these structures, these massive buildings, seeing them weathering the storm,” he told The Cut.
“It doesn’t matter what’s going on, who’s around, or what we’re facing.
"There’s something about the architecture, sort of like the weight of these buildings, that just exudes perseverance in a way.
"It just made me feel less alone.”
The couple was recently spotted on vacation in her native Spain, according to Extra.
Who is Stan’s girlfriend and why do fans think she’s racist?
Social media users have speculated that the Spanish-born Onieva posted a racist photo online.
"Also so everyone knows why #sebastianstanisoverparty is trending, Sebastians gf posted this old photo which is very racist, and some of sebastians (old) fans posted about it on insta asking for it to be taken down, instead of taking it down sebastian and his gf blocked them," one Twitter user named Maya wrote.
Users claims the photo made fun of Asians.
Maya continued: "One of my friends also said that the original person he blocked is asian, and took serious personal offense to what was said and they both proceeded to block.
"Overall this was the wrong way to go about the situation for both of them, and i’m seriously disgusted to be honest."
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Onieva is known for appearing in the Netflix series High Seas.
Have they responded to the backlash?
It does not appear that the couple have responded to the criticism.