221(G) Tracker

Working with my current employer (direct FTE) for over four years now. 1st H1B was stamped (though they had issued 221g last time as well, issued white slip requesting to submit word doc about resume, research, travel etc. and employment/invitation letter). It took full 6 weeks for things to process back then from interview till stamping. This time also VO was mostly concerned with my past job switch when I worked on OPT. My previous employer had filed my H1B. While we awaited lottery decision I switched jobs. The employer did not withdraw my H1B petition after the switch. The job switch was done on STEM OPT as that status was active. Later my H1B was picked and approved so my current employer filed for a transfer for petition. No issues there. Issue arises only during the stamping interview. Not sure what concerns they have with my switch. As every step what my past and current employers did was seeking legal advice.