Unfortunately it can’t be improved somehow from your side. We are continuosly working on extending its support however some things can take some time due the complex of task. You can post feature request on our “Help Desk” so we can review the possibility to add needed CSS/HTML support here: https://e2pdf.com/support/desk/feature-requests.
As about limit, there are no limits, however it could be that generated content overflowed created “HTML” block as E2Pdf works with “static” elements and it can’t make page / html block bigger automatically. You can try to make page size bigger on E2Pdf creation or by going to page options by clicking on “gear” icon over page and change “height” setting with increasing size of “HTML” block to see if it correctly renders data.
With “premium” version it’s possible also to move content to other pages with “Splitting content over pages” feature. “HTML” block can continue content from “parent” block as it showed in this video : https://www.youtube.com/watch?v=SZNxz_JZ3d0&t=79s
We remain at your service.