That is strange. PayTM says on their app "Send money from your wallet to bank for FREE."Heard feedback from my office colleagues that those accounts who do bank transfer, paytm will add more charges to load wallet like 2.65%-4.5% and they block the 4k load via other apps too.
so didnt risk it, again its my own precaution, not sure how the algorithm works
PS: I haven't tried either.