ZDoom, as most of us will know, has changed FLOATBOB so that it is purely a visual effect - the sprite moves but the underlying actor no longer does. This means that dynamic lights attached to floatbobbing actors no longer move up and down in time with the sprite.
From the ZDoom forum:
randi wrote:That just means GZDoom needs to update the corresponding code for dynamic lights. It doesn't mean this is a broken change.Lars2500 wrote:Another thing that got broken with the new FLOATBOB behaviour is the dynamic lights in GZDoom.