sapphire OE laying problems

[Silviaschicks]

My Sapphire OE has been laying weirdly, and I'm wondering if she has a problem with her egg tract. She layed a softy a couple weeks ago, here is the thread about that: https://www.backyardchickens.com/threads/oe-laying-weirdly.1445083/#post-24005287. Today, she layed a super small egg, about 4 cm tall and 3 cm wide. Here is a picture, hers is the egg on the left, on the right is an egg from my BR which is about the same size as the normal eggs my OE lays:

She gets a lot of calcium, and she's had vitamin supplements in her water since she layed the softy. I don't know what's wrong. Also, I don't know if this is related to the problem, but whenever she goes to lay, my BR blocks her from going up (bc they usually lay around the same time, and my BR doesn't want other chickens there when she's laying), and my BR squawks until my OE leaves, and then my OE doesn't want to go back up to lay

 

[sourland]

How old is she ? It is possible that she is about to take a break in her laying cycle.

 

[Silviaschicks]

She is about 10.5 months old

 

[aart]

Also, I don't know if this is related to the problem, but whenever she goes to lay, my BR blocks her from going up (bc they usually lay around the same time, and my BR doesn't want other chickens there when she's laying), and my BR squawks until my OE leaves, and then my OE doesn't want to go back up to lay

This can definitely adds to stress which can effect laying.
You only have to 2 birds?

Open that small egg and take a pic.

 

[Silviaschicks]

Update: I've managed to isolate the aggressor, and my OE is laying normally again now