I've noticed the following exception thrown in JS console:

it seems the following notification handler runs even before MM bot can handle it (has proper market set up on it):

      runstats: (note: RunStatsNote) => {
        this.mm.update()
        if (note.baseID !== this.market.base.id || note.quoteID !== this.market.quote.id || note.host !== this.market.dex.host) return
        if (Boolean(this.mmRunning) !== Boolean(note.stats)) {
          this.mmRunning = Boolean(note.stats)
          this.resolveOrderFormVisibility()
        }
      },

doesn't seem like that leads to any problems in practice, but

• perhaps we might miss some important notification(s) this way causing mm bot UI widget to get stuck until page is refreshed or something
• keeping console log clean would help when debugging other issues