I'm also using Ipad2 as my reading device and I've been having the same problems since the update came live a week ago:
1. Unable to switch pages/chapters (legacy reader, buttons unresponsive)
2. Unable to bookmark series (button unresponsive)
3. Unable to post comments or forum posts (buttons unresponsive)
To sum it all up, all of the problem are related to unresponsive buttons, with the most annoying problem being the inability to switch between chapters while reading (long strip). I haven't tested if the Legacy reader is the cause for this problem though, because older devices such as Ipad2 cannot handle the Normal reader mode due to its high strain on older devices (browsers keep crashing in Normal reader mode).
What makes this even more curious is that everything was working just fine a week ago, but something changed with that site update (login update?) that came live.
I've tried to do all the obvious things from my end, such as clearing the browser caches and hard reset on my tablet, but so far none of them had any effect.
I'm aware that the site is once again under DDoS attack according to the Service Update notification on front page, but are DDoS attacks able to turn buttons unresponsive like this?
I hope that these gets resolved soon, because apparently I'm not the only one who's having them and they're hindering the reading experience.
ps.
https://cdndex.com/
I can view this site with my tablet. Just wanted to mention this, because moderators keep asking about it.