After a new product is added, Regular price is not displayed in the product category page. Other existing products are normal. Even if I copy the original product, Regular price is not displayed in the product category page, but in the product details page.
I hope that you are doing great.
Did you check this deactivating our plugin?
Please deactivate our plugin and check if this happens without our plugin or not.
BTW, this can be a caching issue. Please also clear the cache.
Hope to hear from you soon.