Images with question mark after .jpg

Heya! Sure, here it is:

Featured Image from URL (FIFU) Premium:5.8.4;
WordPress:6.1.1;
Site:https://mysite.com;
License key: xxx;
Email: xxx;
Theme: xxx;
PHP:8.1.14;
WooCommerce:7.4.0;
Pages:11;
Posts:1;
Products:30457;
Images without dimensions:-1;
URLs with metadata:33879;
URLs:33876;
Users:1;
php-curl:yes;
Max lenght:2048;
Plugins:
 - CookieYes | GDPR Cookie Consent (cookie-law-info)
 - Elementor (elementor)
 - Featured Image from URL (FIFU) Premium (fifu-premium)
 - iThemes Security Pro (it-l10n-ithemes-security-pro)
 - Redirection (redirection)
 - Redis Object Cache (redis-cache)
 - Safe SVG (safe-svg)
 - WooCommerce (woocommerce)
 - WP All Import - WooCommerce Import Add-On Pro (wpai-woocommerce-add-on)
 - WP All Import Pro (wp-all-import-pro)
 - WPCode Lite (insert-headers-and-footers)
 - WP Rocket (rocket)
 - Yoast SEO (wordpress-seo);
Active plugins:
 - cookie-law-info
 - elementor
 - fifu-premium
 - ithemes-security-pro
 - redirection
 - redis-cache
 - safe-svg
 - woocommerce
 - wordpress-seo
 - wp-all-import-pro
 - wp-rocket-htaccess-remove-all
 - wp-rocket
fifu_audio:toggleoff;
fifu_auto_alt:toggleoff;
fifu_auto_set:toggleoff;
fifu_auto_set_width:0;
fifu_auto_set_height:0;
fifu_auto_set_blocklist:;
fifu_auto_set_cpt:post;
fifu_auto_set_source:;
fifu_autoplay:toggleoff;
fifu_autoplay_front:toggleoff;
fifu_auto_category:toggleoff;
fifu_bbpress_avatar:toggleoff;
fifu_bbpress_copy:toggleoff;
fifu_bbpress_fields:toggleoff;
fifu_bbpress_title:toggleoff;
fifu_block:toggleoff;
fifu_buy:toggleoff;
fifu_buy_disclaimer:;
fifu_buy_text:;
fifu_cdn_content:toggleoff;
fifu_cdn_crop:toggleoff;
fifu_cdn_social:toggleoff;
fifu_check:toggleoff;
fifu_column_height:40;
fifu_confirm_delete_all:toggleoff;
fifu_confirm_delete_all_time:;
fifu_content:toggleoff;
fifu_content_cpt:toggleoff;
fifu_content_page:toggleoff;
fifu_cron_metadata:toggleoff;
fifu_crop0:;
fifu_crop1:;
fifu_crop2:;
fifu_crop3:;
fifu_crop4:;
fifu_crop_default:div[id^='post'],ul.products,div.products,div.product-thumbnails,ol.flex-control-nav.flex-control-thumbs;
fifu_crop_delay:0;
fifu_crop_ignore_parent:;
fifu_crop_ratio:4:3;
fifu_data_clean:toggleoff;
fifu_decode:toggleoff;
fifu_default_cpt:post,page,product;
fifu_default_url:;
fifu_dynamic_alt:toggleoff;
fifu_enable_default_url:toggleoff;
fifu_error_url:;
fifu_fake:toggleon;
fifu_finder:toggleoff;
fifu_finder_custom_field:;
fifu_fit:cover;
fifu_gallery:toggleoff;
fifu_gallery_selector:ol.flex-control-thumbs;
fifu_get_first:toggleoff;
fifu_grid_category:toggleoff;
fifu_hide_cpt:toggleoff;
fifu_hide_page:toggleoff;
fifu_hide_post:toggleoff;
fifu_hover:;
fifu_hover_selector:;
fifu_isbn:toggleoff;
fifu_isbn_custom_field:;
fifu_lazy:toggleoff;
fifu_loop:toggleoff;
fifu_mouse_vimeo:toggleoff;
fifu_mouse_youtube:toggleoff;
fifu_ovw_first:toggleoff;
fifu_photon:toggleon;
fifu_play_type:inline;
fifu_pop_first:toggleoff;
fifu_query_strings:toggleoff;
fifu_redirection:toggleoff;
fifu_reset:toggleoff;
fifu_rss:toggleoff;
fifu_rss_width:;
fifu_run_delete_all:toggleoff;
fifu_run_delete_all_time:;
fifu_same_size:toggleoff;
fifu_screenshot:toggleoff;
fifu_screenshot_height:0;
fifu_screenshot_high:toggleoff;
fifu_screenshot_scale:0;
fifu_shortcode:toggleoff;
fifu_skip:;
fifu_slider:toggleoff;
fifu_slider_auto:toggleoff;
fifu_slider_counter:toggleoff;
fifu_slider_crop:toggleon;
fifu_slider_single:toggleoff;
fifu_slider_vertical:toggleoff;
fifu_slider_ctrl:toggleoff;
fifu_slider_gallery:toggleoff;
fifu_slider_left:;
fifu_slider_right:;
fifu_slider_thumb:toggleoff;
fifu_slider_pause:2000;
fifu_slider_speed:1000;
fifu_slider_stop:toggleoff;
fifu_social:toggleon;
fifu_social_image_only:toggleoff;
fifu_spinner_cron_metadata:1;
fifu_spinner_db:1000;
fifu_spinner_image:3;
fifu_spinner_nth:1;
fifu_spinner_slider:3;
fifu_spinner_video:3;
fifu_tags:toggleoff;
fifu_unsplash_size:;
fifu_update_all:toggleoff;
fifu_update_ignore:toggleoff;
fifu_upload_job:toggleoff;
fifu_upload_private_proxy:;
fifu_upload_proxy:toggleoff;
fifu_upload_show:toggleoff;
fifu_valid:toggleoff;
fifu_variation:toggleoff;
fifu_video:toggleoff;
fifu_video_background:toggleoff;
fifu_video_color:red;
fifu_video_controls:toggleon;
fifu_video_finder:toggleoff;
fifu_video_gallery_icon:toggleoff;
fifu_video_list_priority:toggleoff;
fifu_video_min_width:100;
fifu_video_mute:toggleoff;
fifu_video_mute_mobile:toggleoff;
fifu_video_play_button:toggleon;
fifu_video_play_hide_grid:toggleoff;
fifu_video_play_hide_grid_wc:toggleoff;
fifu_video_priority:toggleoff;
fifu_video_privacy:toggleoff;
fifu_video_thumb:toggleon;
fifu_video_thumb_cpt:toggleon;
fifu_video_thumb_page:toggleon;
fifu_video_thumb_post:toggleon;
fifu_video_zindex:1000;
fifu_wc_lbox:toggleon;
fifu_wc_zoom:toggleon;
Image:
 
Video:;
Slider:;
Shortcode:;
REST routes:
- https://mysite.com/wp-json/:PHP;
- https://mysite.com/wp-json/:JS

I understand that, and I won’t go into Premium details here. Do you think this can be resolved somehow if I contact you via email? I’m more asking if you think this is related to FIFU or WP All Import (you should be allowed to answer this question here), so I know if I should contact them instead. Thanks!