OK I think it’s from the Photo Splash plugin. I opened it and those logs were written but the second time I opened it it doesn’t happen and if I reload the plugins it doesn’t happen again. I’ve emailed the developer.
I don’t use justify items anywhere in the code, I am, however setting labelConnection.style.justifyContent = "space-between";…
The error appears after loading plugins and causes slider elements’ widths to appear smaller Reloading seems to help temporarily though…