As an owner of very low end (Azpen) tablets the Facebook Lite app has been a godsend, requiring very little space and eliminating the need for separate Messenger app.
I have this app installed on a 4.2.2 tablet and a 5.1.1 tablet. On the 4.2.2 it's awesome, what FB should be. But on the 5.1.1 there are excessive "sponsored ads". Every third or fourth post is one of these, always asking the user to install an app. The number of ads coupled with the small screen makes the app almost unusable, since pretty much half of what you see are these ads.
I suspect that these ads aren't really coming from Facebook but rather from something sinister, since the "hamburger menu" at the bottom right of these ads does not work. On a real FB ad this menu gives you the choice to say "show me less like this" or similar. But on these ads, touching the hamburger menu just refreshes the feed.
How can I isolate what may be causing this difference in behavior, and put an end to it?
Note: both tablets are rooted.