Post text not dispalying

Hi, it seems that I have encountered a problem after posting on my blog for the first time in about a year. I’ve switched to Gutenberg, not sure if this matters, and posted without any issues. However after the post went live I realised that only the title and the main picture would show on the home page – as oppose to the title, the picture and the excerpt as it normally would. When I clicked on the post I further realised that there was no text only the main image, even though I also included a number of pictures, which do show when I go to edit the post. Then, thinking that perhaps my theme is not fully compatible with Gutenberg I switched to the old editor and copied and pasted everything creating a new post. Again, I had the same problem but then the original post created in Gutenberg, once published showed the main picture and the excerpt on the home page as all other posts do. However, yet again when I click on the new post (created in the old editor) only the main picture is visible, which puzzles me. I then created a mock post just with text and published it and this post displayed as normal with complete text, although I didn’t include images. Does anyone know what causes this issue and how to fix it please? Thank you in advance.

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