Fix Repeater memoization memory leak #3250

Job	Run time
JS unit tests	1m 12s
.NET unit tests (ubuntu-latest)	5m 35s
Build all projects without errors	9m 12s
Build published projects without warnings (Release)	1m 35s
.NET unit tests (windows-2022)	5m 49s
UI tests (chrome, ubuntu-latest, Production)	13m 26s
.NET unit tests (macOS-latest)	45s
Build published projects without warnings (Debug)	1m 45s
UI tests (chrome, windows-2022, Development)	26m 43s
UI tests (firefox, ubuntu-latest, Development)	17m 13s
UI tests (firefox, ubuntu-latest, Production)	16m 33s
	1h 39m 48s

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