I have same problem, > simple product with price defined inside product (20$>5$). The problem occurs when someone adds something to the cart that is not included in the price rule. When I add a product to the cart that is covered by pricing rule, it appears with the correct price (original price crossed out), and for that specific cart it works fine. So, it seems to me that the bug relates to everything that is not in the pricing rules. When all the rules are turned off, the problem exists with everything.
{
"show_unmodified_price_if_discounts_with_coupon": false,
"show_matched_bulk": false,
"show_matched_cart_adjustments": false,
"show_matched_get_products": false,
"show_matched_adjustments": false,
"show_matched_deals": false,
"show_matched_bulk_table": true,
"show_category_bulk_table": false,
"show_striked_prices": true,
"show_onsale_badge": true,
"limit_results_in_autocomplete": "25",
"rule_max_exec_time": "5",
"rules_per_page": "50",
"support_shortcode_products_on_sale": false,
"support_shortcode_products_bogo": false,
"show_cross_out_subtotal_in_cart_totals": false,
"bulk_table_calculation_mode": "only_bulk_rule_table",
"combine_discounts": false,
"default_discount_name": "Coupon",
"combine_fees": false,
"default_fee_name": "Fee",
"default_fee_tax_class": "",
"enable_product_html_template": false,
"price_html_template": "{{price_html}}",
"initial_price_context": "nofilter",
"do_not_modify_price_at_product_page": false,
"discount_table_ignores_conditions": false,
"use_first_range_as_min_qty": false,
"show_message_after_add_free_product": false,
"message_template_after_add_free_product": "Added {{qty}} free {{product_name}}",
"is_calculate_based_on_wc_precision": false,
"replace_price_with_min_bulk_price_category": false,
"replace_price_with_min_bulk_price_category_template": "From {{price}} {{price_suffix}}",
"uninstall_remove_data": false,
"update_prices_while_doing_cron": true,
"allow_to_edit_prices_in_po": false,
"suppress_other_pricing_plugins": false,
"allow_to_exclude_products": true,
"create_blank_rule": false,
"show_debug_bar": false,
"discount_for_onsale": "compare_discounted_and_sale",
"is_override_cents": false,
"prices_ends_with": "99",
"hide_coupon_word_in_totals": false,
"process_product_strategy": "when",
"process_product_strategy_after_use_price": "first",
"is_enable_cart_amount_saved": false,
"is_enable_minicart_amount_saved": false,
"is_enable_checkout_amount_saved": false,
"is_enable_backend_order_amount_saved": false,
"external_cart_coupons_behavior": "apply",
"external_product_coupons_behavior": "apply",
"disable_external_coupons": "dont_disable",
"load_in_backend": false,
"replace_price_with_min_bulk_price": false,
"replace_price_with_min_bulk_price_template": "From {{price}} {{price_suffix}}",
"disable_shipping_calc_during_process": false,
"support_persistence_rules": false,
"external_coupons_behavior": "apply",
"readonly_price_for_free_products": true,
"update_prices_while_doing_rest_api": false
}