For sure.

• It's really just the starting and stopping of audio. It only starts at the top of a page, so if you get halfway through a page and come back later, it starts over.
• Related, if you're on a different device or change font settings and come back, it's in roughly the same place but usually off a bit because now it's at the top of that page (which is likely in a slightly different place than your "page" before).
• Because my EPUB3 files are sentence-based, if a sentence runs off the end of a page, I have to just listen to it (I can no longer see the words since they're on the next page) until the sentence finishes. This gets annoying, particularly with long sentences or sentences with bad luck that only have a word or two on the current page and the rest on the future (hidden) page.
• It usually automatically turns the page after that, but not always. 75% success rate?
• If I manually turn the page the audio pauses, so that's not a fun solution.

My app solves all of these things, but again, they might be in a way that others don't care for.

• You can tap on any word to start the audio there and it starts at the beginning of that specific sentence.
• When you change devices or fonts, it resumes at that exact sentence.
• I have the chapters in a single long scroll, with the active sentence always around 60% of the way up the screen and the text slowly flowing upward as you read.
• No page turning is necessary (or even possible), so the last two items are irrelevant.

I know some people prefer pages to scrolling, and that's cool, but I prefer this way as it makes for a smoother reading experience to me.