The rate of frost walker ice disappearing seems to not be affected by lowering tick speed through the randomTickSpeed gamerule, the ice does however disappear more quickly with a tick speed above the default value 3. To reproduce, use tick speeds 0, 1, 100 and 1000.
Other things usually affected by randomTickSpeed seem to work fine, tested with grass growth.
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What does "related" exactly mean in this context? Because I don't know if it is related in the sense that it has the same cause, since changing the tick speed does affect the melting rate, just not for lower values.
Can confirm for 1.11
Can confirm for MC 1.12.1.
Confirmed for 1.13.1.
Affects 1.16 Release Candidate 1
Affects 1.16.2 Pre-release 1

In 1.16.1
Can confirm in 20w49a.
Can confirm in 20w51a.
Affects 21w05b.
May I request ownership? The original reporter has not been active in a year.
Relates to MC-93320