spelunking
"Spelunking" from LCI doesn't untap lands when 'Lands enter the battlefield untapped' is selected.
Tried it in two different games - both of them failed to untap the land. :(

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Hello,
For this issue, please submit at: https://mtgarena-support.wizards.com/hc/en-us/requests/new and select 'Report a Problem in your Event'.
Thanks!
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hey_kelvin#86641 commented
When you play an ETB tapped cave in LCI with Spelunking, the UI gives you two options on which replacement effect to use. Clicking on the Spelunking replacement effect is not causing the land to enter untapped, which is presumably the bug in question. This happened to me as well.
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Kpsla#37203 commented
Spelunking does not untap lands. Spelunking causes land that would enter the battlefield tapped to enter untapped instead. That is what "Lands enter the battlefield untapped" means.