crash entering some new Ocean Buffet worlds

Game crashes after "Preparing spawn area", when 1st person view has been drawn but before player has a chance to move around.

Same exception with both of these:
Buffet / Caves / Ocean, seed -3573814383023018062
Buffet / Flying Islands / Ocean, seed -6830602506930575933

Description: Exception generating new chunk

java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: bound must be positive