How are you opening these pop-up layers?
Probably using a button such as a hamburger (the three stacked rectangles) to link to the pop up layer. I have used this and it works fine with my caution about linking to a large page of text. For example, I have used this at www.rabbibrin.com The links to the essays do not work on an OK but not real strong network signal. But they work fine if you have a good WiFi connection.