I have programmatically created a block. In my module folder I added all suggested templates in a templates folder(mymodule/templates/suggestedtemplatename.html.twig).
However the block is not using any of them! I have enabled the theme debugger which gives me all the suggestions and describes which part of the page is produced from which template. I can see only block.html.twig producing html. I tried drush cr and uninstalling/installing the module