Hi Tobias
I might have a similar problem?
I use Tablepress for at table with 5339 rows and 4 columns and update every week by importing an Excel. (csv-file)
But today both Firefox and Chrome couldn’t load the page entirely, and a warning showed saying: “A webpage is slowing your browser”, and it couldn’t load the page.
I had to terminate the page, luckily the table got updated allright. But when I try to open the table in Tablepress, the same thing happens. This doesn’t happen on other pages.
I run the newest WordPress and has Divi as theme.
I am very fond of Tablepress, thanks again for your excellent work.