This is probably from SettingsHub. Labels in older frames don’t show. Here are my screenshots that look almost identical but show the script name:
I’ve previously seen this whenever there was a lot printing to the output. I think instead of making new labels, the dev console just changes the text and color of existing labels, which causes text layout and localization to have to run for over one hundred labels.
Evidence contributing to this factor is that if I join the game (same as the one ColdSmoke was in) and don’t open the dev console then I don’t see these lag spikes. I also had reasonable performance on my phone until I opened up the dev console.
In this game, both me and ColdSmoke have access to the server console log, and the server console log is near-constantly printing out that it has saved a player’s data.