Google stole my AI credits?

I’m an Ultra user, and I get 25,000 AI credits every month. But today I suddenly found that my credits had been used up. These are all of my credit usage records.

P1: 12+27+843+113+179+56+56+345+227+363=2221

P2: 14+628+832+111+57+122+147+68+643+332=2954

P3: 63+14+20+115+436+46+27+88+276+192=1227

P4: 226+90+54+583+664+606+90+489+1071+261=4134

P5: 11+3+2+70+316+119+41+399=961

2221+2954+1227+4134+961=11497

WHERE IS MY AI CREDIT ?

I dealt with 503 errors for nearly a week, and after rolling back to the old version, I soon discovered that some of my AI credits had mysteriously gone missing.