My Tesco order yesterday was also missing stir fry veg mix! Weirdly though, aside from corn on the cob, the rest of my fresh veg arrived. But there was no frozen veg - I’d ordered peas, green beans and sweetcorn to fill the gap left by my Christmas food, and there were no suitable alternatives.
I had 9 subs altogether yesterday, and 4 unavailable, which is the most I’ve had for a long time. Happy enough with the subs as Tesco tend to sub up, so I have a 600g pack of diced beef instead of 400g, and 750g pack of mince instead of 250g!
But no frozen or fresh corn is worrying - very glad I stocked up on tinned now, as it’s the only veg DS eats.