How to continue EC when my 10mo old only wants to poop standing up

We’be been doing lazy EC since she was 8m. She’s done great. We have the Baby Bjorn potty.

The past few days, I noticed that when she was ab to poop she would get frantic and try to stand. I helped distract her to keep her on the potty (didn’t force her, but she also can’t stand on her own, so it was like forcing her) Well that made her cry! It wasn’t bc of hard poop or anything bc it was all soft. Yesterday I let her poop in her diaper and she had no issues, no crying…

Do I just wait a week or so can try again? Until she figures out how to poop sitting?