It looks like the issue was caused by using AT+KCELLMEAS=0. Based on the command description, I assumed that mode 0, which provides standard cell coverage details, would result in the fastest URC response. Maybe I misunderstood how it works?
In any case, switching to AT+KCELLMEAS=1,35 solved the problem for me.
Yes, there is no problem with running an at cmd.
This is what I am following to set power configs.
No, not with this thread; I think it was more relevant to the PSM issue thread than this one.
btw, I checked the issue, and the modem sw version at that time was 5.5.8. it looks like that psm issue has existed since that version.