Game crashes after creating/entering a Debug Type world

The game crashed whilst ticking player

1.16.2-pre2: [^crash-2020-08-05_11.26.54-server.txt]

Description: Ticking player

java.lang.IllegalStateException: Unregistered biome
	at bw.b(SourceFile:88)
	at bw$$Lambda$4540/1295484091.get(Unknown Source)
	at java.util.Optional.orElseThrow(Optional.java:290)
	at bw.a(SourceFile:88)
	at bw.a(SourceFile:68)
	at bx$a.a(SourceFile:55)
	at bx.a(SourceFile:31)
	at bx$$Lambda$4537/457642732.test(Unknown Source)
	at ck.a(SourceFile:62)
	at bx.a(SourceFile:31)
	at aah.v_(SourceFile:484)
	at aay.b(SourceFile:207)
	at nd.a(SourceFile:234)
	at aax.c(SourceFile:173)
	at net.minecraft.server.MinecraftServer.b(SourceFile:881)
	at net.minecraft.server.MinecraftServer.a(SourceFile:810)
	at emy.a(SourceFile:92)
	at net.minecraft.server.MinecraftServer.w(SourceFile:669)
	at net.minecraft.server.MinecraftServer.a(SourceFile:254)
	at net.minecraft.server.MinecraftServer$$Lambda$4097/78048568.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:745)