Issue #3160238 by JeroenT, phenaproxima, vsujeetkumar, ravi.shankar, snehalgaikwad, dishabhadra, vakulrai, gmercer, mitthukumawat, RoshaniBhangale, thalles, Abhijith S, chandu7929, janmejaig, tanubansal, manojithape, quietone: Media Library widget produces "This value should not be null" error when field is required

Issue #2215857 by michielnugter, Lendude, gmercer, tim.plunkett, cferthorney, marabak, olli, ericmulder1980, TwoD, sanduhrs, stella, dww, nod_: Behaviors get attached to removed forms