Slow price loading when rounding

When using dynamic values ​​for the product Display Price Rounded/Compare At Display Price Rounded, and reviewing the site, the prices load quite slowly, about 2 seconds after rendering the whole page, from the beginning only the first digit of the amount is displayed, and then it loads the entire amount. Тhis behavior is observed for prices more than 1000 which are four numbers and have a delimiter. When using values ​​that do not round the price Display Price/Compare At Display Price, it is displayed instantly.

That's why I think that using rounded values ​​is a bug.