If you refresh the page after you go back, do the buttons show then?
Yep, this is more a question for the Lemmy developers itself or the developers of a third-party app.
Just looked at the test build for 0.19.
It looks like the bug is resolved in next release,
Water sensor near your washing machine.
And a smart speaker connected to HA in the bedroom to play a alarm once the smoke detector goes off.
Can you please provide a screenshot of the error you are getting? You can upload the screenshot to Imgur or something like that.