I'm in much the same boat, except for the Marathi! Though in my case the officer transferred the visa without any prompting, saying it would save me carrying two passports. I appreciated his effort, but I still present both old and new documents on arrival.

I think the logic is that deep in the system your visa is indelibly tied to your old passport, so swiping your new passport doesn't bring your visa to the screen. Entering the visa number shown in the new travel document should work, but some officers might not be happy with that work-around - especially if it is one not expressly supported by their regulations.

At the end of the day, excluding on a technicality, a visitor who clearly has an entry visa might be unlikely - but I'd prefer to avoid anxious, unpleasant and time consuming interactions on arrival.

However, I've ignored the insistence (at Amritsar) that I should also carry the original acknowledgement of my successful e-visa application beyond the first visit, when the visa was stamped into my passport..