Image uploads: file_title corrupted with random number

[Margriet]

Hello,
I'm experiencing a systematic image upload issue with VirtueMart 4.6.4 on Joomla 5.4.2, confirmed across multiple independent installations on different servers/hosting providers.
Problem Description:
When uploading product images, the file_title field in the #__virtuemart_medias table gets corrupted by having a random number appended after the file extension.
Examples:

• EM1B8765-2147x1006.jpg becomes EM1B8765-2147x1006.jpg_16467
• P9140313.webp becomes P9140313.webp_2251 (media_id 2927)
• SAM_3458.jpg becomes SAM_3458.jpg_1

Additional Issues:

• file_is_product_image is incorrectly set to 0 instead of 1 on upload
• file_url remains correct (no corruption)
• Thumbnails generate successfully with correct filenames
• Images display correctly on frontend despite the corruption
• Backend media list shows the corrupted file_title

Environment:

VirtueMart: 4.6.4 (11226)
Joomla: 5.4.2
PHP: [8.3]
Confirmed on multiple installations, different servers and hosting companies

Database Evidence:

Code Select Expand

SELECT virtuemart_media_id, file_title, file_url, file_is_product_image
FROM #__virtuemart_medias
WHERE file_type = 'product'
ORDER BY virtuemart_media_id DESC
LIMIT 10;Results show file_title with incorrect extensions and file_is_product_image = 0.
Temporary Workaround:
Running these queries periodically to fix corrupted records:
Fix file_is_product_image

Code Select Expand

UPDATE `#__virtuemart_medias`
SET `file_is_product_image` = 1
WHERE `file_type` = 'product'
AND `file_mimetype` LIKE 'image/%'
AND `file_is_product_image` = 0;
-- Fix corrupted file_title

Code Select Expand

UPDATE `#__virtuemart_medias`
SET `file_title` = REGEXP_REPLACE(`file_title`, '\\.(jpg|jpeg|png|gif|webp)_[0-9]+$', '.$1')
WHERE `file_title` REGEXP '\\.(jpg|jpeg|png|gif|webp)_[0-9]+$'
AND `file_type` = 'product';Questions:

• Is this a known issue with VirtueMart 4.6.4 and Joomla 5.4.2?
• Is there a fix or update planned?
• What could be causing the random number suffix in file_title?

Any guidance would be greatly appreciated. This affects thousands of product images across multiple stores.
Thanks in advance for your help!