The tea fungus does not float on top, is that bad?Updated a year ago

No, this is not bad. Sometimes the tea fungus stays on top, sometimes it hangs vertically in the glass or even sinks to the bottom. Everything is fine and completely harmless.

By the way, if the tea fungus sinks to the bottom, a new offshoot forms at the top. If the tea fungus stays on the top, it increases in thickness.