Fixed basket coupon adding random discounts to products

Hi there,

On a few orders our fixed basket discount coupon is applying random discounts to individual products, which may cause issues if/when refunds are given.

Please see screenshot here:
https://snipboard.io/S1Vv7q.jpg

The coupon provides a fixed discount of ￡35 when a minimum spend of ￡85 is met and certain products are in the basket. The majority of the time it works, but on a few occasions it throws the above error.

Wondering if I’ve missed a setting or something?

Many Thanks,

Josh

WC status:

### WordPress Environment ###

WordPress address (URL): https://whitecoco.co.uk
Site address (URL): https://whitecoco.co.uk
WC Version: 5.9.0
REST API Version: ? 5.9.0
WC Blocks Version: ? 6.1.0
Action Scheduler Version: ? 3.3.0
WC Admin Version: ? 2.8.0
Log Directory Writable: ?
WP Version: 5.8.2
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: –
WP Cron: ?
Language: en_GB
External object cache: –

### Server Environment ###

Server Info: Apache
PHP Version: 7.4.24
PHP Post Max Size: 256 MB
PHP Time Limit: 300
PHP Max Input Vars: 2500
cURL Version: 7.65.0
OpenSSL/1.0.2k-fips

SUHOSIN Installed: –
MySQL Version: 5.5.5-10.4.22-MariaDB-log
Max Upload Size: 128 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Remote Post: ?
Remote Get: ?

### Database ###

WC Database Version: 5.9.0
WC Database Prefix: 40_
Total Database Size: 328.36MB
Database Data Size: 208.66MB
Database Index Size: 119.70MB
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### Post Type Counts ###

attachment: 7424
custom_css: 1
custom_order_status: 1
customize_changeset: 5
elementor_library: 1
nav_menu_item: 38
oembed_cache: 7
page: 32
popup: 2
popup_theme: 8
post: 5
postman_sent_mail: 4
product: 787
product_variation: 1372
revision: 1401
seedprod: 2
shop_coupon: 28
shop_order: 15395
shop_order_refund: 2780
stores: 2
wc_whsm: 1
wpcf7_contact_form: 3

### Security ###

Secure connection (HTTPS): ?
Hide errors from visitors: ?

### Active Plugins (37) ###

Advanced Woocommerce Product Gallery Slider: by UnikInfotech – 1.0.0
Complianz | GDPR/CCPA Cookie Consent: by Really Simple Plugins – 5.5.2
Contact Form 7 Extension For Mailchimp: by Renzo Johnson – 0.5.52
Contact Form 7: by Takayuki Miyoshi – 5.5.3
Custom Order Status for WooCommerce: by Tyche Softwares – 2.0.3
Elementor: by Elementor.com – 3.4.8
Essential Addons for Elementor: by WPDeveloper – 4.9.6
Facebook for WooCommerce: by Facebook – 2.6.7
Imsanity: by Exactly WWW – 2.7.2
Smash Balloon Instagram Feed: by Smash Balloon – 2.9.7
Jetpack: by Automattic – 10.3
Mailchimp for WooCommerce: by Mailchimp – 2.5.4
MainWP Child: by MainWP – 4.1.8
Max Mega Menu: by megamenu.com – 2.9.5
Popup Maker: by Popup Maker – 1.16.3
PW WooCommerce Gift Cards Pro: by Pimwick
LLC – 1.330

Rearrange Woocommerce Products: by Aslam Doctor – 3.0.4
Redirection: by John Godley – 5.1.3
Storefront Product Sharing: by WooCommerce – 1.0.6
UpdraftPlus - Backup/Restore: by UpdraftPlus.Com
DavidAnderson – 1.16.65

WC Secondary Product Thumbnail: by Hendy Tarnando – 1.3.2
Advanced Shipment Tracking for WooCommerce: by zorem – 3.3.1
WooCommerce Admin: by WooCommerce – 2.8.0
Print Invoice & Delivery Notes for WooCommerce: by Tyche Softwares – 4.6.4
WooCommerce Stripe Gateway: by WooCommerce – 5.8.1
Woocommerce Gift Wrapper: by Little Package – 4.5.1
WooCommerce POS Pro: by kilbot – 0.4.19
WooCommerce POS: by kilbot – 0.4.26
WooCommerce Product CSV Import Suite: by WooCommerce – 1.10.20
WooCommerce Product Stock Alert: by WC Marketplace – 2.7.1
WooCommerce Sequential Order Numbers: by SkyVerge – 1.9.5
WooCommerce Shipping & Tax: by WooCommerce – 1.25.20
Stock Manager for WooCommerce: by StoreApps – 2.8.1
WooCommerce: by Automattic – 5.9.0
Yoast SEO: by Team Yoast – 17.6
WP Mail SMTP: by WPForms – 3.2.1
YITH WooCommerce Wishlist: by YITH – 3.3.0

### Inactive Plugins (6) ###

Advanced Coupons for WooCommerce Free: by Rymera Web Co – 3.0.1
Advanced Dynamic Pricing for WooCommerce: by AlgolPlus – 3.3.2
Advanced Shipping Validation for WooCommerce: by Jeroen Sormani – 1.1.5
Checkout Countdown for WooCommerce: by Puri.io – 3.1.3
Wordfence Security: by Wordfence – 7.5.7
WP Crontrol: by John Blackbourn & crontributors – 1.12.0

### Must Use Plugins (2) ###

Elementor Safe Mode: by Elementor.com – 1.0.0
StackCache: by Stack CP –

### Settings ###

API Enabled: ?
Force SSL: –
Currency: GBP (￡)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
pw gift card (pw-gift-card)
simple (simple)
variable (variable)
yith-composite (yith-composite)

Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

Connected to WooCommerce.com: –

### WC Pages ###

Shop base: #10 - /
Basket: #11 - /basket/
Checkout: #12 - /checkout/
My account: #13 - /my-account/
Terms and conditions: #65 - /returns/

### Theme ###

Name: Storefront Child Theme
Version: 1.0.0
Author URL: https://prystine.co.uk
Child Theme: ?
Parent Theme Name: Storefront
Parent Theme Version: 3.9.1
Parent Theme Author URL: https://woocommerce.com/
WooCommerce Support: ?

### Templates ###

Overrides: storefront-child-theme-master/woocommerce/emails/customer-completed-order.php
storefront-child-theme-master/woocommerce/emails/customer-invoice.php
storefront-child-theme-master/woocommerce/global/quantity-input.php
storefront-child-theme-master/woocommerce/myaccount/orders.php
storefront-child-theme-master/woocommerce/single-product/product-image.php
storefront-child-theme-master/woocommerce/single-product.php

### Action Scheduler ###

Canceled: 4
Oldest: 2021-11-08 10:50:05 +0000
Newest: 2021-11-18 11:00:44 +0000

Complete: 16,031
Oldest: 2021-10-29 15:41:20 +0100
Newest: 2021-11-29 13:40:06 +0000

Failed: 6
Oldest: 2020-12-07 16:31:29 +0000
Newest: 2020-12-07 16:31:29 +0000

Pending: 1
Oldest: 2021-11-30 11:25:51 +0000
Newest: 2021-11-30 11:25:51 +0000

### Status report information ###

Generated at: 2021-11-29 13:40:09 +00:00