Good catch, in our case we have upgraded a bit earlier ( FIX: Selected group cleared between emoji uploads (#15581) · discourse/discourse@48f70dc · GitHub), 7 days before the potential fix.
Can confirm it on Monday morning anyhow since we will deploy the new v2.9.0.beta1 version by then.
Many thanks for looking into it,
Ismael
Note for the future, to attach both the version and the targeted commit when reporting a bug.