Thanks for this, Ricardo.

On my end, I get another, very different issue with Next:

--8<---------------cut here---------------start------------->8---
 ** Message: 18:18:48.587: Method parameter(s): 0, Next - Finally redone correctly. : funny - https://old.reddit.com/r/funny/comments/a53e07/finally_redone_correctly/
0:00:02.051478122 .[332m14317.[00m 0x7f76e8004100 .[33;01mWARN   .[00m .[00;01;36m  GST_PLUGIN_LOADING gstplugin.c:792:_priv_gst_plugin_load_file_for_registry:.[00m module_open failed: /home/ambrevar/.guix-profile/lib/gstreamer-1.0/libgstcoreelements.so: undefined symbol: gst_type_find_helper_get_range_full

(WebKitWebProcess:14317): GStreamer-WARNING **: 18:18:49.129: Failed to load plugin '/home/ambrevar/.guix-profile/lib/gstreamer-1.0/libgstcoreelements.so': /home/ambrevar/.guix-profile/lib/gstreamer-1.0/libgstcoreelements.so: undefined symbol: gst_type_find_helper_get_range_full
0:00:02.051531648 .[332m14317.[00m 0x7f76e8004100 .[33;01mWARN   .[00m .[00;01;36m  GST_PLUGIN_LOADING gstplugin.c:1329:gst_plugin_load_by_name:.[00m load_plugin error: Opening module failed: /home/ambrevar/.guix-profile/lib/gstreamer-1.0/libgstcoreelements.so: undefined symbol: gst_type_find_helper_get_range_full
0:00:02.051536679 .[332m14317.[00m 0x7f76e8004100 .[33;01mWARN   .[00m .[00;01;36m  GST_PLUGIN_LOADING gstpluginfeature.c:133:gst_plugin_feature_load:.[00m Failed to load plugin containing feature 'funnel'.
0:00:02.051564072 .[332m14317.[00m 0x7f76e8004100 .[33;01mWARN   .[00m .[00;01;37;41m GST_ELEMENT_FACTORY gstelementfactory.c:397:gst_element_factory_create:<funnel>.[00m loading plugin containing feature (null) returned NULL!

(WebKitWebProcess:14317): GStreamer-CRITICAL **: 18:18:49.129: gst_bin_add: assertion 'GST_IS_ELEMENT (element)' failed

(WebKitWebProcess:14317): GStreamer-CRITICAL **: 18:18:49.129: gst_element_get_static_pad: assertion 'GST_IS_ELEMENT (element)' failed

(WebKitWebProcess:14317): GStreamer-CRITICAL **: 18:18:49.129: gst_ghost_pad_new: assertion 'GST_IS_PAD (target)' failed

(WebKitWebProcess:14317): GStreamer-CRITICAL **: 18:18:49.129: gst_element_add_pad: assertion 'GST_IS_PAD (pad)' failed
--8<---------------cut here---------------end--------------->8---

Looks like the plugins don't match the core.

-- 
Pierre Neidhardt
https://ambrevar.xyz/