If anyone has similar experience. The most recent update has borked Post Loop on my install.
2.10.12 – 4 November 2019
Resolve issue caused by locate_template preventing plugins from adding Post Loop templates.
Unfortunately, the only result that it now returns is its own page wherever the Loop is enabled.
I had three different post loops all working fine, pulling a selection of posts from the category but by keyword. Now I have three loops all displaying the same page, the page that the post loops are on. ie. the loop is only self-referential.
Any chance of a fix?