Factor fails on a simple expression

This bug in Factor has been addressed as of version 11.3.0.

While the example may take some seconds to run, it will not hang

AbsoluteTiming[res1 = Simplify[exp];]
AbsoluteTiming[res2 = Factor[exp];]
Simplify[res1 - res2]

(* {0.060817, Null} *)
(* {13.5211, Null} *)
(* 0 *)

AbsoluteTiming[res2 = exp // FactorTerms // Factor]

gives 0.03 seconds for me using Mathematica 12.0.