Minimal example:

(function() {
    db.c.insert({_id: 1, num: NumberDecimal("infinity")});
    const pipe = [{$match: {"num": {$bitsAnyClear: 11111000}}}];
    let explain = db.c.explain().aggregate(pipe);
    if (explain.queryPlanner.winningPlan.slotBasedPlan) {
        print("EXPLAIN: \n" + explain.queryPlanner.winningPlan.slotBasedPlan.stages);
    }
    
    print("RESULTS: " + tojson(db.c.aggregate(pipe).toArray()));
})();

This pipeline gives different results between SBE and classic. Classic returns the document, while SBE does not. According to our documentation, $bitsAnyClear will not match values which can't be represented in a 64 bit integer (See "floating point" section of the page). SBE's behavior matches the documentation (hence I'm not marking this as a "bug" ticket).

There is a note in some of the SBE stage builder code that we try to match classic's behavior despite the documentation (see here).