The behavior of
Limit changed in Mma 11.2, and I think it is in some ways undesirable or possibly buggy. Consider
Limit[Sin[t Pi], t -> Infinity, Assumptions -> Element[t, Integers]]
This used to (11.1) produce a correct result and no longer does (11.3). Is this intentional or a bug? (More understandable but still slightly disappointing is that
Limit no longer returns limiting sets of values. E.g., removing the assumptions from the above expression, it used to return an interval, while it now returns the less informative
I am aware than I can change to
DiscreteLimit, which is a nice addition, or use other tricks (e.g.,
Sum of differences).