morph to desert wrongly treats vines as solid blocks and convert bottommost grass/dirt above it to sand making it fall when loading world in game

[aefoivai]

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• Sprite Issues? See https://github.com/TEdit/Terraria-Map-Editor/wiki/Install-Requirements#for-sprite-viewing
• Won't Start? See https://github.com/TEdit/Terraria-Map-Editor/wiki/Troubleshooting#application-launch-or-map-loading-issue
• Map not loading? See https://github.com/TEdit/Terraria-Map-Editor/wiki/Troubleshooting#application-launch-or-map-loading-issue

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Describe the bug
morph to desert wrongly treats vines as solid blocks and convert bottommost grass/dirt above it to sand making it fall when loading world in game

Steps to reproduce the behavior:

1. Click morph icon at left, morph biome desert, moss type none/grass, tick base tiles and evil, brush some grass and dirt blocks that have vines below

Expected behavior
bottommost grass/dirt block become hardened sand

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Version Tedit 5.1.34
• Terraria Version: 1.4.5.6