[MC-180569] Highest block that exists at X/Z coordinates is over build limit or negative value after updating

After updating server from 20w16a to 20w17a height map gets corrupted. At some places on the F3 screen CH and SH values are ether over build limit or negative value. this is characterized by :

colons of rain going through blocks

Rain stopping at the reported CH value with no block present there

Inability to grow large trees at the locations with corrupted height(How i discovered the bug)

the Issue seems to be related to MC-139017 and MC-180566

Related issues

duplicates

MC-179952 Height map data doesn't get converted

Attachments

Comments

migrated 2020-04-24T21:05:51Z

[media][media][media]

Arisa Bot 2020-04-24T21:05:54Z

⚠️ Please do not mark Unreleased Versions as affected. You don't have access to them yet.

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migrated 2020-04-24T21:11:05Z

MC-180568 and other map issues seem related as updated maps show gray strips at coordinates that have CH value below ground

migrated 2020-04-25T04:57:16Z

i have the same issue with rain and maps the grey strips on new maps and raining under ground

migrated 2020-04-25T06:15:52Z

This is the exact issue I am having... I really hope there is a way to fix this.