When this plugin is enabled you'll get your interface broken when pressing "Reload UI" button - up until stop the server and start it over.
Why is it happening? (possibly)
in the file scripts/m2m_ui.py in function on_ui_tabs you're creating a Toprow object with id_part. For some reason when pressing "Reload UI" button until server restarts this code adds "_1" to the "Generate" button in txt2img tab - and thus all Gradio scripts which expect txt2img_interrupt, txt2img_skip and txt2img_generate ids have in the txt2img tab txt2img_interrupt_1, txt2img_skip_1 and txt2img_generate_1 - which generates errors in Gradio and it silently breaks. I would recommend rewriting the UI interface code with omitting using the Toprow class.