The last two jobs I accepted expired without the app ever allowing me to complete the job.
It let me read the shop overview, accept the job, assigned it to me, then the app didn't respond when I tried to do the shops. I was already on-site, and did not accept the job until I was on site. I have plenty of data, and I had 5 bars of service. But the app just absolutely stared back at me and did nothing at all. Wouldn't open to the job. But the timer was there, and live, and I could see the seconds and minutes counting down.
I am truly afraid to even try again. This was after over 30 successful jobs.