same height for all tabs

This wasn’t a requirement when the plugin was built, so this is not currently possible. The plugin code can probably be tweaked to allow this to be configured by means of an additional shortcode parameter to apply something like the jQuery Match Heights script https://github.com/liabru/jquery-match-height.

I probably won’t be able to set aside any time to look into adding this feature however, unless I had a requirement for this for one of my own projects or if someone commissioned the work.