Hadn’t seen this yet (my apologies if someone else has already disused it).
Seven’s Olympics watermark (at least main channel) is animated, like a throwback to 2003-2011 with the old “7 Sport” watermark, with just the larger “7” appearing for 10sec (with PRG/classification bug) and then it gets smaller and drops backwards, as the Olympic rings twirl on underneath and a split second later the coloured promo add-on (Big Brother in this case) appears, fading to watermark a minute or two later.
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Also, since the Olympics watermarks have also appeared on the multi-channels (except 7flix), the watermark doesn’t fade in immediately upon return from an ad break, instead there’s a 20sec delay with no watermark. Possibly an error that hasn’t been picked up yet? And I don’t believe there’s any animation with the Olympic rings twirling. The promo add-ons are the same however. Promo add-ons are also on 7flix - but 7flix seems to experience more issues/errors than the other channels too.