When using Interactive Tables in the Opera GX browser, long tables embeded into articles with higher than 10.5 sized font cut off before the end of the table. Opening the same articles and tables in different browsers show the entire table. When discussing with Tillerz and SoulLink in the #Help channel in the discord, Tillerz discovered that "Opera GX might somehow apply some limits here, to cut stuff to fit on the screen. max-height: 75 vh;"

Open the articles CSS and edit the Table Contents font. Increase the font size. The table will become cut off past a certain point at the bottom of the screen.