/gamerule randomTickSpeed 0
/setblock -45 101 -9 minecraft:frosted_iceWatch the block start to melt.
randomTickSpeed should govern the speed, I expect this to not melt at all. I'm thinking that maybe MC-99411 was fixed to ignore randomTickSpeed instead of studiously obeying it? At least at zero, that's what seems to happen
Thank you for your report!
After consideration, the issue is being closed as Working as Intended.
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