I was laid off from my event job at the beginning of the pandemic but I stayed in touch with my boss the whole time.

I was laid off from my event job at the beginning of the pandemic but I stayed in touch with my boss the whole time. She keeps on saying she is going to bring me back but last summer I needed to work for a paycheck. I got a job that I hated and stayed there a year but recently quit because she said she would hire me back in October. I never got a written contact and now she is saying she can bring me back in November. The dilemma is, since I was waiting so long and now I’m not working, I applied to a temp event job at a great company making more money. I got the job but it’s only for 4 months with a possibility to extended. If I take this job I would be leaving my old boss without help and the possibility of never going back to a boss and job I love. I could also be out of a job again in the near future. Should I wait it out for my old job or move on to something else? I’ll be okay if I’m not working for another month but will need to be working by December.