In deed it is a problem in our kendo-angular-icons component. You can try show and hide icons with static names, as in this stackblitz sample. I've logged an enhancement issue in our github issue tracker, where you can subscribe for updates. Given the fact it is still version 0.4.0 of kendo-angular-icons , will assure you that fix will follow promptly.
As a small token of gratitude for a bug found, I've increased your Telerik points by 200.
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